Many of you have read byrong's article on actual battery charge.
http://forum.xda-developers.com/showthread.php?t=871051
He discusses the creep down from 100% to 90% overnight; as well as bump charging.
I am offering a solution that will give you 100% (or over 100% if you so choose) every night without any effort after initial setup.
Lets first look at the charger:
Output:
5v
1000 mAh
So every hour, your charger could potentially flow 1000 mA into your battery, right? There's actually two contingencies:
How much can the battery pull, and the roll-off at the peak of the charge.
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According to byrong's data, the last 10% charge rate rolls from 650 to 100mah in 45 minutes almost linearly. Prior to this roll-off, we are seeing 650 mAh pull from the battery which appears to be linear.
Ok now we can do our time calculation:
mAh of your battery: A = (1300 for stock)
Charge Rate: CR = (650)
10% roll-off: -(650-100)/(45/60) = -733 mAh/h (approx) Feel free to do the integral .1A/∫(650-733t)dt. Im just going to call it a flat +45 mins.
(A-A*.1)/CR + (45/60) = charge time in hours.
For stock, this is:
(1300 - (.1*1300))/650 + (45/60) = T (h)
T(h) = 2.55 hours. FROM ZERO CHARGE
I normally run down to about 30%. In that case... 1300*.3 = 390 -1300 = 910 mAh to charge
Run the calc again:
(910 - (.1*910))/650 + (45/60) = T (h)
T(h) (30%) = 2.01 Hours
Now what do we do with this?
Say hello to the appliance timer (you can get them at the dollar store):
http://www.amazon.com/50460-24-hour-Multi-Event-Appliance-Timer/dp/B000G1MD80
100% Charge Procedure:
Set ON 2 hours before you normally wake up.
Set OFF sometime prior to when you go to sleep.
You get:
100% charge every morning
If you oversleep, worst case scenario you end up with 90%.
BUMP Charge Procedure:
Set ON 3-4 hours before you normally wake up.
Set OFF 2 hours after that.
Set ON immediately after OFF,
Set OFF .5 hours after,
etc... until you've bumped to your desired level.
From now on just plug your phone in when you go to bed, and wake up to a 10% fresher battery every morning!
If you normally deplete your battery to a point where it will not make it until 2 hours before you wake up, consider setting your first OFF to 30 mins after you normally go to sleep.
ENJOY.
(+ Thnx if it helped you plz!)
After testing different batteries I have sort of a mini stockpile going on, so I'll be using this to bump charge my phone. Before it was just too much of a hassile to bump charge but this makes it easy
awesome, how many bumps do you normally do?
sweeeet. but question; do these appliance timers tick like a timeR? haha that would drive me insane while sleeping
jayochs said:
sweeeet. but question; do these appliance timers tick like a timeR? haha that would drive me insane while sleeping
Click to expand...
Click to collapse
nope. it will tick once when it switched from off to on etc. There are also digital ones.
Simple, ingenious and falls into that "Why didn't I think of that" category. Thanks for the tip.
Just tried this last night, worked flawlessly; woke up @99% charge
vassskk said:
Just tried this last night, worked flawlessly; woke up @99% charge
Click to expand...
Click to collapse
Yep woke up to 97% here so still some tweaking to do, but better than the 92% I normally wake up to.
UHF3 said:
Simple, ingenious and falls into that "Why didn't I think of that" category. Thanks for the tip.
Click to expand...
Click to collapse
Yes it does. Thanks for the idea!
i greatly appreciate mashing of the thnx button
I thought that bump charging was bad for the battery. Is the slight increase in initial charge worth degrading the life of the battery? Any insight on how bad this actually is for the batter?
pharpe said:
I thought that bump charging was bad for the battery. Is the slight increase in initial charge worth degrading the life of the battery? Any insight on how bad this actually is for the batter?
Click to expand...
Click to collapse
Bump charging while the phone is fully turned on has almost no affect because it doesn't truly bump charge- you're just keeping it at 100% instead of having your phone drain it down to ~90% and keeping it there. If you want to go over 100% you have to turn off Android (phone) and purely charge the battery, then if you unplug and do it again that's real bump charging.
If done regularly (with phone turned off) it can and will damage your battery degrading the overall lifespan. The benefit is you can end up with 105-115% normal battery capacity where when you turn on your phone, it will stay at 100% for hours.
But yea when I said bump charging before I meant with the phone on :s
This walkthrough assumes you have read the linked article. Definitely turn your phone off first if you are planning on doing the bumpcharge method.
Sent from my ADR6300 using XDA App
Question for the expert
vassskk said:
This walkthrough assumes you have read the linked article. Definitely turn your phone off first if you are planning on doing the bumpcharge method.
Sent from my ADR6300 using XDA App
Click to expand...
Click to collapse
Love the linked article and this walk through. My questions are do these timers(or the one you linked on Amazon) allow for multiple settings (like 4 different on/off times) or just one time for on and one time for off?
And I'm assuming the initial method is with your phone left on, bump charge with phone turned off? Since you are definitely the expert, which method do you prefer and why?
wkupike2000 said:
Love the linked article and this walk through. My questions are do these timers(or the one you linked on Amazon) allow for multiple settings (like 4 different on/off times) or just one time for on and one time for off?
And I'm assuming the initial method is with your phone left on, bump charge with phone turned off? Since you are definitely the expert, which method do you prefer and why?
Click to expand...
Click to collapse
Almost all timers you can set an on/off time for half-hour increments- the digital ones you can probably be more specific.
Mine I set off/on 3 times right before I wake up.
Bump charging with your phone on will just keep your battery at 100%, since android by default keeps it around 90% if plugged in constantly (keeping a battery fully charged for extended periods of time is potentially damaging/ also reports of cheap batteries that are overcharged or on the charger too long exploding)
Bump charging with your phone off will overcharge your battery, this will cause some battery cells to die and lessen the amount of charge your battery can hold the next time you charge it. If you continue to do this then after 2-4+ months of bump charging, you may end up with a battery that will only bump charge as much as a normal charge used to be. This would be where you either buy a new battery or live with that fact.
+1
Byrong calls bumpchargers 'power users' that will 'buy new batteries every few months.' So it really doesnt matter that your trashing your battery if you perceive the temporary life gain to outweigh the loss of longevity.
Most timers have "multiple events." You just set them using little plastic pins so it really doesn't cost them anything to give you a bunch of pins.
I personally leave my phone on, as it is my 2nd alarm clock. I have my inital off set to 2am (about 30 mins after my usual sleep time) to bring the battery up to the optimal 40% charge it should sit at. My on is set to 6am, 2 hours before i normally wake up. I do not bump, as i am not baller' $$$$$.
vassskk said:
This walkthrough assumes you have read the linked article. Definitely turn your phone off first if you are planning on doing the bumpcharge method.
Sent from my ADR6300 using XDA App
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Click to collapse
i thought if you charge you phone when its "off" you dont need to bump charge. I always charge mine at night and i will turn it on in the morning after boot i get 99% 2 min later after everything is done loading it still at 99% and i can get a whole day out of it. (stock battery) or if i run pandora for 11 hours (work 8 hours and commute 1.5 hours each way.) i will end up with 13%
Cool, Going to try tonight.
synisterwolf said:
i thought if you charge you phone when its "off" you dont need to bump charge. I always charge mine at night and i will turn it on in the morning after boot i get 99% 2 min later after everything is done loading it still at 99% and i can get a whole day out of it. (stock battery) or if i run pandora for 11 hours (work 8 hours and commute 1.5 hours each way.) i will end up with 13%
Click to expand...
Click to collapse
Well ya, charging your phone regularly with it off will get you 100%, but people like bump charging because you can overcharge the battery to 105-120%
Unless.. what you're saying is I don't need to 'bump charge' with my phone on when I can just normal charge with it off? And to that I say neh! I use mine as my main alarm clock and would like to be woken up if someone calls or texts me (most of the time anyway..)
For some or maybe even most people turning off your phone and charging might be the better choice.
I believe that even charging your phone with it off, will still allow it to creep down to 90% though yea? Those protect circuits are physically part of the battery.
Heres one:
http://datasheet.sii-ic.com/en/battery_protection/S8200A_E.pdf
Related
I noticed that I was getting some really bad battery life with only average usage, so I figured that this might be in part due to it being turned on and activated at the store without first being charged. So last night I tried to go through the motions of recalibrating the battery, but there is no way to reset the stats. I finally got the battery down to about 5% and it hovered there for long over an hour with constant audio streaming and then later 3d gaming, so I know it is not reading the battery properly. I charge it all the way with the phone off overnight, and when I get up, it is reading 100% without the disconnect warning. I turn it on and I have been using it all day today, but I am having the same symptoms.
Is there a way to accurately recalibrate the battery sensor?
Having the same problems.
Same problem for me... I recharged my phone to 100% and did a factory reset today, hopefully that helps.
Sent from my SPH-D700 using XDA App
you could try the battery conditioning method that fixed a lot of evo users' battery issues: h**p://forum.xda-developers.com/showthread.php?t=701567
dwyw42 said:
you could try the battery conditioning method that fixed a lot of evo users' battery issues: h**p://forum.xda-developers.com/showthread.php?t=701567
Click to expand...
Click to collapse
I did this and the battery is great! I checked an email and browsed the web for 5 minutes and my battery is at 97 after an hour and a half.
lehaman310 said:
I did this and the battery is great! I checked an email and browsed the web for 5 minutes and my battery is at 97 after an hour and a half.
Click to expand...
Click to collapse
did anyone else try this and have success? I had my phone on 0% for a good long while the other day and it never shut off. There is definitely something wrong with the initial battery calibration for a lot of us.
trying this at the moment. will update when done.
It's a lithium-ion battery, guys... They don't have a memory effect. All calibrating it (as you all call it) is going to do is shorten the overall lifespan of the battery. You can argue all you want, but it only takes a little bit of research to learn all of this. People are too used to the days of nickel-metal hydride and nickel-cadmium batteries where calibration and training were necessary.
These batteries like to hold a charge and be full. They like top-offs and constant charging. If you can, charge your phone mid-day, but at least every night. Draining your battery - especially as regularly as some as you do to "calibrate" it - will only bring it closer to its eventual death.
DevinXtreme said:
It's a lithium-ion battery, guys... They don't have a memory effect. All calibrating it (as you all call it) is going to do is shorten the overall lifespan of the battery. You can argue all you want, but it only takes a little bit of research to learn all of this. People are too used to the days of nickel-metal hydride and nickel-cadmium batteries where calibration and training were necessary.
These batteries like to hold a charge and be full. They like top-offs and constant charging. If you can, charge your phone mid-day, but at least every night. Draining your battery - especially as regularly as some as you do to "calibrate" it - will only bring it closer to its eventual death.
Click to expand...
Click to collapse
No one is talking about draining the battery as a calibration method. Read the post on xda.
odub303 said:
No one is talking about draining the battery as a calibration method. Read the post on xda.
Click to expand...
Click to collapse
Read the first post, got frustrated (a lot of Hero users had the same idea about discharging... poor people probably get awful battery life now), and posted my reply.
The EVO users might be on to something, but that behavior is more associated with a battery that has been let dormant forever. If you have an Xbox 360 (with play and charge kit) or PS3 with multiple controllers, you can test this. Most people use one controller and the extras don't get much play. When you try to charge it, it'll read full much before it is actually full and will die quickly, but if you continue to connect and disconnect the charger, it will keep trying to charge it and eventually will come back to life...
If this is the case with our Epics, I wonder if we're using old batteries... My manufacturing date on my battery is July 27, which means it probably sat around for a little over a month before it got used again. But that shouldn't be long enough to cause this problem.
Did anyone else have an almost-dead battery when they got it? My package said that the battery should have been fully charged, but it certainly wasn't. What is the manufacturing date on everyone else's battery?
DevinXtreme said:
Read the first post, got frustrated (a lot of Hero users had the same idea about discharging... poor people probably get awful battery life now), and posted my reply.
The EVO users might be on to something, but that behavior is more associated with a battery that has been let dormant forever. If you have an Xbox 360 (with play and charge kit) or PS3 with multiple controllers, you can test this. Most people use one controller and the extras don't get much play. When you try to charge it, it'll read full much before it is actually full and will die quickly, but if you continue to connect and disconnect the charger, it will keep trying to charge it and eventually will come back to life...
If this is the case with our Epics, I wonder if we're using old batteries... My manufacturing date on my battery is July 27, which means it probably sat around for a little over a month before it got used again. But that shouldn't be long enough to cause this problem.
Did anyone else have an almost-dead battery when they got it? My package said that the battery should have been fully charged, but it certainly wasn't. What is the manufacturing date on everyone else's battery?
Click to expand...
Click to collapse
The build date on my battery is 7-25-10, and it was really low when I got my phone. Of course, I had no clue because the battery icon in the upper right hand corner is horribly inaccurate lol. I have a feeling a lot of the July 2010 build batteries are defective in some way or another. There is a running thread on adroidcentral where people are posting their phone and battery build dates and what, if any, issues they are having.
DevinXtreme said:
Read the first post, got frustrated (a lot of Hero users had the same idea about discharging... poor people probably get awful battery life now), and posted my reply.
The EVO users might be on to something, but that behavior is more associated with a battery that has been let dormant forever. If you have an Xbox 360 (with play and charge kit) or PS3 with multiple controllers, you can test this. Most people use one controller and the extras don't get much play. When you try to charge it, it'll read full much before it is actually full and will die quickly, but if you continue to connect and disconnect the charger, it will keep trying to charge it and eventually will come back to life...
If this is the case with our Epics, I wonder if we're using old batteries... My manufacturing date on my battery is July 27, which means it probably sat around for a little over a month before it got used again. But that shouldn't be long enough to cause this problem.
Did anyone else have an almost-dead battery when they got it? My package said that the battery should have been fully charged, but it certainly wasn't. What is the manufacturing date on everyone else's battery?
Click to expand...
Click to collapse
Maybe I didn't word my post correctly, but I know about the Ni-Cd/Li-Ion difference, and I know that the Li-Ion's don't have memory, but I am talking about recalibrating the sensor to accurately report the battery life. I know that this prinicple works even if my explanation isn't accurate, because when I first switched to Darchstar's (may his name be praised) CyanogenMod Froyo port, the battery life was terrible; but when I applied the battery fix, the "recalibration", or whatever the proper word is, the battery life increased fivefold. That is what I want to achieve on the Epic, move that extra power which is found on the low end so it is accurately displayed on the scale (no, not physically move it, I just didn't know how else to say that). I'm going to try the Evo fix now and see how that works, but I hate the "Charging Complete" thing, because I woke up, and my phone was at 68% battery, so it just sat there plugged in but not recharging all night.
My battery manufacture date is August 12th, and when I got the phone, I didn't actually look at the real battery life, but the indicator was in the second stop, so it could have been anywhere in a wide range, since the first stop doesn't seem to occur until about 70%.
dwyw42 said:
you could try the battery conditioning method that fixed a lot of evo users' battery issues: h**p://forum.xda-developers.com/showthread.php?t=701567
Click to expand...
Click to collapse
trying this now as i type. hope it works because my battery life is no good lol. let yall know results when im done and test it out
USAF22 said:
Maybe I didn't word my post correctly, but I know about the Ni-Cd/Li-Ion difference, and I know that the Li-Ion's don't have memory, but I am talking about recalibrating the sensor to accurately report the battery life.
Click to expand...
Click to collapse
Your understanding is the same as mine. Tjhe old NiCads needed to be "conditioned" by deep discharge, but the Lithium Ions don't. However, our problem is not conditioning the physical battery, but calibrating the logic on the phone that calculates the battery status. It needs to learn what 0% and 100% look like to phone's sensors.
The sensors themselves, IIRC, are reading two physical properties: voltage and temperature. The calculated percentage is a function of these, but can vary with the state of a given battery unit.
So it is a good idea to do a deep-discharge cycle at the beginning, and maybe occasionally later, to calibrate this function. However, it is also true that a deep discharge is not healthy for the long-term battery life, so the procedure should be performed sparingly.
DevinXtreme said:
Read the first post, got frustrated (a lot of Hero users had the same idea about discharging... poor people probably get awful battery life now), and posted my reply.
The EVO users might be on to something, but that behavior is more associated with a battery that has been let dormant forever. If you have an Xbox 360 (with play and charge kit) or PS3 with multiple controllers, you can test this. Most people use one controller and the extras don't get much play. When you try to charge it, it'll read full much before it is actually full and will die quickly, but if you continue to connect and disconnect the charger, it will keep trying to charge it and eventually will come back to life...
If this is the case with our Epics, I wonder if we're using old batteries... My manufacturing date on my battery is July 27, which means it probably sat around for a little over a month before it got used again. But that shouldn't be long enough to cause this problem.
Did anyone else have an almost-dead battery when they got it? My package said that the battery should have been fully charged, but it certainly wasn't. What is the manufacturing date on everyone else's battery?
Click to expand...
Click to collapse
I had an all but dead battery when I picked up my first phone. I had many other problems with that phone and took it back for another. Unfortunately I kept the original battery. After numerous little problems with the phone, and poor charge times, I swapped the battery out for the one in the charger/battery kit I picked up. It was almost fully charged out of the box. I did a full charge on it, and all the little problems seem to have vanished. The date on the "bad" battery was 7/27/2010. I'm guessing there's a bunch of unreliable batteries out there, and they may be the cause behind other problems people are having.
Now if they can just come up with a fix for the WiFi config file corruption problem, I'm totally sold on this phone.
There is a thread on here that talks about calibrating the battery for an Evo and it did wonders for my phone. I don't have the link but here are the steps:
1. Phone is on. Charge untill told to unplug charger.
2. Unplug charger and turn off phone.
3. Plug in charger and charge until phone beeps (about 1-5 minutes)
4. Unplug charger and turn on phone
5. Charge to 100% again (1-5 minutes)
6. Unplug charger and reboot.
7. All done! Enjoy a new battery.
Before I did this "calibration", I was really feeling bummed that my battery didn't last. I followed a few other recommendations (dark screen, turn off unused services, etc) and I got 1.5 days and still had 10 percent left! This was using the device lightly to moderately. Try it but DO NOT RUN YOUR BATTERY ALL THE WAY DOWN! It's not good for these types of batteries even though there is a safety zone built in.
johnnyh64 said:
There is a thread on here that talks about calibrating the battery for an Evo and it did wonders for my phone. I don't have the link but here are the steps:
1. Phone is on. Charge untill told to unplug charger.
2. Unplug charger and turn off phone.
3. Plug in charger and charge until phone beeps (about 1-5 minutes)
4. Unplug charger and turn on phone
5. Charge to 100% again (1-5 minutes)
6. Unplug charger and reboot.
7. All done! Enjoy a new battery.
Before I did this "calibration", I was really feeling bummed that my battery didn't last. I followed a few other recommendations (dark screen, turn off unused services, etc) and I got 1.5 days and still had 10 percent left! This was using the device lightly to moderately. Try it but DO NOT RUN YOUR BATTERY ALL THE WAY DOWN! It's not good for these types of batteries even though there is a safety zone built in.
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Click to collapse
I'll try this tonight, I did the method that was posted earlier in the evo thread and my charge actually reached 100% for once but was back down to 98% 2 minutes later. I'll try it again I suppose.
p2flol said:
I'll try this tonight, I did the method that was posted earlier in the evo thread and my charge actually reached 100% for once but was back down to 98% 2 minutes later. I'll try it again I suppose.
Click to expand...
Click to collapse
Well I just did it so we'll see how my battery is at work, it still sits at 98% I'm guessing the cells are not balanced.
I did the charge, power off, charge, power on sequence this morning about 5 times. I have the Battery Watcher widget installed, and I just now I charged it until it said it was fully charged and Battery Watcher said it was 97%. I powered off the Epic, and charged it until it said it was full, I powered it on and Battery Watcher said 91%. What's going on?? Is Battery Watcher inaccurate? Is the phone's way of determining how charged it is inaccurate?
USAF22 said:
I noticed that I was getting some really bad battery life with only average usage, so I figured that this might be in part due to it being turned on and activated at the store without first being charged. So last night I tried to go through the motions of recalibrating the battery, but there is no way to reset the stats. I finally got the battery down to about 5% and it hovered there for long over an hour with constant audio streaming and then later 3d gaming, so I know it is not reading the battery properly. I charge it all the way with the phone off overnight, and when I get up, it is reading 100% without the disconnect warning. I turn it on and I have been using it all day today, but I am having the same symptoms.
Is there a way to accurately recalibrate the battery sensor?
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Just topping the battery off, I thought this was funny, took it off charger, and put back on charger. and it still says fully charged + charging.. yeah.. I agree something wack with the sensor. This lasted for 4-5 mins.. then phone gave me pop up/vibrated.. (fully Charged!)
sucks. I know there are threads about this but I just am sick of this. I had the Evo for a bit and I swear that battery life was better.
I don't know if its because of my crappy reception or what--but I can't even last a morning of light use with this phone. Super annoying... I had high expectations but when i'm getting low battery warnings before noon with barely using the phone at all, something has got to be wrong. I did a factory reset, did a full discharge/full charge. after it said fully charged i unplugged and plugged back in. i don't know what else to try. should i replace my phone? ask for a different battery? the date on the battery is 8/14.
Ok my rant is over...publicly that is.
edit: mods you can just delete this thread. i also hate clutter and hate that my rant has added to it. (hopefully we get some sort of update/custom rom soon that fixes battery!)
e3chaos said:
sucks. I know there are threads about this but I just am sick of this. I had the Evo for a bit and I swear that battery life was better.
I don't know if its because of my crappy reception or what--but I can't even last a morning of light use with this phone. Super annoying... I had high expectations but when i'm getting low battery warnings before noon with barely using the phone at all, something has got to be wrong. I did a factory reset, did a full discharge/full charge. after it said fully charged i unplugged and plugged back in. i don't know what else to try. should i replace my phone? ask for a different battery? the date on the battery is 8/14.
Ok my rant is over...publicly that is.
Click to expand...
Click to collapse
The battery life on my EVO is not better.
What do you do with the phone that drains it so much?
Open up your battery statistics. What is using it the most? How long is your display on for (select "display" from battery history and it will say long long it has been on for).
Have you charged it correctly for 1st time use? (charge to 100%, then drain to 0, then charge to 100% again)?
Seems like you are experiencing much faster battery drain than expected. My battery lasts all day long with light use (~22 hours). 10-12 hours under heavy use (3-4 hours of screen on time). I use juice defender as well, and I keep my screen brightness at 0% (still pretty bright) unless I go outside).
hydralisk said:
The battery life on my EVO is not better.
What do you do with the phone that drains it so much?
Open up your battery statistics. What is using it the most? How long is your display on for (select "display" from battery history and it will say long long it has been on for).
Have you charged it correctly for 1st time use? (charge to 100%, then drain to 0, then charge to 100% again)?
Seems like you are experiencing much faster battery drain than expected. My battery lasts all day long with light use (~22 hours). 10-12 hours under heavy use (3-4 hours of screen on time). I use juice defender as well, and I keep my screen brightness at 0% (still pretty bright) unless I go outside).
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Click to collapse
i've done everything you said. this isn't my first smart phone.. i've been around a long time. :-/. from what i have been reading some have been getting the ok battery life while others are in the sinking boat with me. just frustrating..i've been giving it more than one chance since i got it at 8am 1 week ago.
Bro turn off wat u don't need. Auto sync is adrain and having data connected is a drain as well. If ur not using the data then turn it off. U can still txt n get calls. N when u wanna check the net or watever then turn it bak on.
Sent from my SPH-D700 using XDA App
I tried all of that with my epic but it sucked the battery way worse than my evo
Sent from my PC36100 using Tapatalk
In Battery Usage / Cell standby, what is your time without signal? If it's high (like over 10%) this will eat your battery, so you'll need to reset the radio by quickly going into airplane mode (hold power) and leaving airplane mode. TWS will drop quickly. Weird bug, you'll have to do this once every reboot, hope it gets fixed.
Also, if you are in an area like work or home that has wi-fi, leave it always on, turn off "notify open networks" and hit Menu / Advanced to switch the wi-fi policy to "never sleep". When you are at home or work the phone will auto connect to these places and do all data over wi-fi which uses less power than 3G, even when the screen is asleep.
Finally, while I leave on window animations & Google Talk, I turn brightness in the browser and on the phone all the way down and turn off haptic feedback except for the capacitive buttons.
I've been unplugged since 8:30am and have been at work & home and texting all day, light surfing, a few phone calls, apps, etc, and now at 10pm I have 65% battery remaining. I think that's pretty good.
ss4rob said:
I've been unplugged since 8:30am and have been at work & home and texting all day, light surfing, a few phone calls, apps, etc, and now at 10pm I have 65% battery remaining. I think that's pretty good.
Click to expand...
Click to collapse
Wha?! All that and still 65% by 10pm? If I let my phone sit on the desk from 8:30 am by 10pm I would probably be less than 65%.
The range of experiences is just way too wide on this board. I like this phone so much that I've decided to just accept it drains battery and have chargers everywhere. Plus I have 2 in my house purchased in different stores that exhibit the same power consumption.
ss4rob said:
Also, if you are in an area like work or home that has wi-fi, leave it always on, turn off "notify open networks" and hit Menu / Advanced to switch the wi-fi policy to "never sleep". When you are at home or work the phone will auto connect to these places and do all data over wi-fi which uses less power than 3G, even when the screen is asleep.
Click to expand...
Click to collapse
You wanna explain this to me? Do you mean ALWAYS have wi-fi enabled? Or just when I'm at home? I use wi-fi at home for both the better battery life and faster speeds, but I was under the impression that if I always had it on that it would always be searching for signal, thus being entirely counterproductive.
mc-fine said:
Wha?! All that and still 65% by 10pm? If I let my phone sit on the desk from 8:30 am by 10pm I would probably be less than 65%.
The range of experiences is just way too wide on this board. I like this phone so much that I've decided to just accept it drains battery and have chargers everywhere. Plus I have 2 in my house purchased in different stores that exhibit the same power consumption.
Click to expand...
Click to collapse
This. I don't have all the chargers yet, but come Friday, I'll have two house chargers, an extra computer cable (for school/work), and my car charger. This phone is too awesome to let my battery life ruin it.
I've noticed that web browsing kills it fastest, which wasn't a surprise at all. I usually get 8-10 hours out of it, which is a lot lower than desired, but something I can live with. At least if I get my chargers, I can save the overall life of the battery.
Another thing to mention:
Vibration, while convenient and least annoying to everyone else, is the most power-draining notification you can use. Next is audio. Last is silence (obviously). Having it make noise AND vibrate is like signing your battery life's death warrant.
i think hydralisks epic runs on fairy dust and unicorn blood bc my epic sucked battery like no other.. and thats...screen brightness at 0...no programs running at all. and it still said 77% of battery drain was from the display. lol
+1 yeah battery life does suck worst than evo I rebooted phone once and it was at 40% came back on at 2% had similar problems with moment just have to deal with it juicedefender does help overall its horrible
Sent from my SPH-D700 using XDA App
ryan74701 said:
i think hydralisks epic runs on fairy dust and unicorn blood bc my epic sucked battery like no other.. and thats...screen brightness at 0...no programs running at all. and it still said 77% of battery drain was from the display. lol
Click to expand...
Click to collapse
Fairy dust and unicorn blood = I know how to use a phone. Copying word for word what I posted in the other battery life thread............
I'm convinced that if you know what you're doing, you can make the battery last very long.
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First one reads: 21 hours and 29 minutes. For almost 4 hours of that, the screen is on. So you people saying you get 5 hours of battery life are doing something very wrong... or you have a bad phone. I can easily surpass 4 hours battery life with the screen on the whole time. Some of you don't seem to realize that once the phone hits 10-15%, it takes a LONG TIME to get it down to 0%. This is probably due to the battery just not being calibrated yet. At 6% battery I actually had to watch a whole hour of movies to get it to 0%... and even then the phone did not shut down.
Edit: phone was in airplane mode because the battery was at 0% and I didn't want it to crash before I snapped the photos. Cell standby is a major killer of battery. A solution to that (if you have a large cell standby number) is just to toggle airplane mode on and off when you boot up your phone. It works... dont know why. By my cell standby is almost always down to 5-10% now. More info on this issue here: http://forum.xda-developers.com/showthread.php?t=772571
i agree with hydralisk, try toggling the airport mode on and then off. it will reboot the antenna of the epic. the cell standby mode totally drains the phone's battery reguardless of user activity or not. mine was 51% without signal but after the airport mode toggling, it dropped down to 8% without signal and my battery is somewhat better. (i'm a hardcore user so 8-10 hours is awesome for me. haha)
I can say that my first Epic was a bad phone. It wouldn't even last 3 hours on a single charge! It would discharge while browsing amazon.com and bn.com using the built-in browser and while plugged into the AC charger. I thought I was seeing things.
Today, I've exchanged it for a 2nd Epic. It still does discharge when I'm pounding away on it even though it's plugged into a USB charger. But otherwise, everything else is looking at lot better now, especially AC charging.
So there are good and there are some very bad examples of the Epic out there. I believe I've personally had my hands on both kinds.
e3chaos said:
sucks. I know there are threads about this but I just am sick of this. I had the Evo for a bit and I swear that battery life was better.
I don't know if its because of my crappy reception or what--but I can't even last a morning of light use with this phone. Super annoying... I had high expectations but when i'm getting low battery warnings before noon with barely using the phone at all, something has got to be wrong. I did a factory reset, did a full discharge/full charge. after it said fully charged i unplugged and plugged back in. i don't know what else to try. should i replace my phone? ask for a different battery? the date on the battery is 8/14.
Ok my rant is over...publicly that is.
edit: mods you can just delete this thread. i also hate clutter and hate that my rant has added to it. (hopefully we get some sort of update/custom rom soon that fixes battery!)
Click to expand...
Click to collapse
I'm getting great life with the latest rooted kernel by noobl. 5 hours and phones at 98% medium usage
i am getting similar hours to hydralisk.
i love this phone! it looks like there may be a few bad apples in the bunch, but i hope everyone else who got a good phone is enjoying it as well!
Yes, according to this guy.
http://forum.androidcentral.com/galaxy-tab/44768-bettery-life-results.html
Anyone feel the same way?
its better than i expected, but i doubt its better than sammys tests
Same here it seem way better than I expected but I haven't tested the battery life thoroughly yet but indeed it is very good.
Tomorrow I will be flying back home. I'll be in the air for about 6 hours. I have 2 movies to watch, plus I'll be playing games and will listen to music. I am planning not to charge my tab until I get home. Let's see how it goes. I will update.
Being that my battery use is ~80% display, i should probably consider turning down the brightness. Still, I have been playing with it here and there throught the day (about 7 hours away from the charger now) and the battery level is still 75%
Somebody needs to find a way to mod the autobrightness to have a few options...I like the feature, but it is just a bit too dim for me.
beestee said:
Being that my battery use is ~80% display, i should probably consider turning down the brightness. Still, I have been playing with it here and there throught the day (about 7 hours away from the charger now) and the battery level is still 75%
Somebody needs to find a way to mod the autobrightness to have a few options...I like the feature, but it is just a bit too dim for me.
Click to expand...
Click to collapse
My tab lost 10% battery for one hour medium usage (display on, 30% brightness, reading mainly). Dose it mean I have a battery issue here?
raymentchen said:
My tab lost 10% battery for one hour medium usage (display on, 30% brightness, reading mainly). Dose it mean I have a battery issue here?
Click to expand...
Click to collapse
no. it just depends on what your doing. Wifi signal strength, Cell radio strength. the position of the moon and sun, etc.
BTW, battery life does not decrease linearly. so the numbers in that post are ridiculous.
the discharge curve will look something similar to this in most cases
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(red line, also note phones cut off the extreme ends of the scale with regards to voltage to promote cell life)
it takes a few days for the battery (more specifically the charging circuitry) to get into a 'groove' when it comes to properly charging the battery and displaying the correct percentage.
if you want to know more about the Batteries in our phones and Tablets look at RCcar and RC plane sites. they use the same batteries as phones do so pretty much everything you learn there will apply here (except our phones don't draw 20+amps! )
http://www.fmadirect.com/lipo_handbook/fma_lipo_handbook_section2.htm
Mine can easily last and day and a half, very impressed with the battery
crazy talk said:
no. it just depends on what your doing. Wifi signal strength, Cell radio strength. the position of the moon and sun, etc.
BTW, battery life does not decrease linearly. so the numbers in that post are ridiculous.
the discharge curve will look something similar to this in most cases
(red line, also note phones cut off the extreme ends of the scale with regards to voltage to promote cell life)
it takes a few days for the battery (more specifically the charging circuitry) to get into a 'groove' when it comes to properly charging the battery and displaying the correct percentage.
if you want to know more about the Batteries in our phones and Tablets look at RCcar and RC plane sites. they use the same batteries as phones do so pretty much everything you learn there will apply here (except our phones don't draw 20+amps! )
http://www.fmadirect.com/lipo_handbook/fma_lipo_handbook_section2.htm
Click to expand...
Click to collapse
Well, I understand you saying here. But 10% (90% to 80%) per hour for reading ebook only is far away from having a good battery at 4000mah. I will give it a few more days to check.
calin75 said:
Tomorrow I will be flying back home. I'll be in the air for about 6 hours. I have 2 movies to watch, plus I'll be playing games and will listen to music. I am planning not to charge my tab until I get home. Let's see how it goes. I will update.
Click to expand...
Click to collapse
Well? How did that go?
Sent from my GT-P1000 using XDA App
raymentchen said:
Well, I understand you saying here. But 10% (90% to 80%) per hour for reading ebook only is far away from having a good battery at 4000mah. I will give it a few more days to check.
Click to expand...
Click to collapse
That's 10 hours at that usage, give or take, and right around what I'm seeing, 10% per hour of actual usage as an ebook, about 2-5% per hour if it's just sitting there connected, and about 15-20%/hour with heavy surfing or game playing.
I expect if I'm careful and keep the connectivity to a bare minimum, I can stretch 12 hours out of it when travelling.
Oh, and everyone...let the battery run down to zero at least once, preferably twice. We're talking total discharge to the point the phone turns itself off, then charge to 100%. This doesn't hurt or help the battery, but it does help make the actual battery monitoring more accurate.
honestly im not too impressed with the battery. i think the standby time sucks too. the iPad doesnt do a lot of things right, but the one thing it seems to do is to last for days. i realize the battery is close to twice as big but i was just use to that. i mean sure i dont use my ipad anymore, but it seems to last forever. anway, when i first got my tab, i managed to drain it in less than 6 hours. that was right out of the box (so it proly wasnt full all the way, but close to it). i was mad when that happened. that was with the brightness on auto and everything turned off except wifi. i could be just expecting too much. i thought conditioning the battery would be good for it. so i let it die all the way and recharged it to full. today, i wouldnt say i used the tablet like i usually would (i am a HEAVY user) and its been less than 12 hours and its already at 21%. this time it was running on 3G and brightness on low (not all the way, but about 30% or so). i dont even set the brightness to the highest cuz its too bright, auto seems to work the best. maybe im just being a tough critic. i mean my nexus only lasts like 5 hours now a days cuz i just use it too much. but im so use to just picking up another battery and moving along.
been having a good battery life after draining the battery to 3% twice then charging it to full again and now it almost last me 2 days better than my old nexus one using it primarily for comic book reading and bluetooth stereo music almost 6hrs. per day and a little gaming of angry birds and a little video and youtube + browsing calling and texting really don't like games too much
@croak
i've read a forum sometime ago that it's bad to drain li-ion to 0% so i think its better to drain it to near zero before charging again as i've read it may damage the cells if you drain it to 0%
how often should we condition the battery? (let it drain near 0 and charge up)
geogetski666 said:
@croak
i've read a forum sometime ago that it's bad to drain li-ion to 0% so i think its better to drain it to near zero before charging again as i've read it may damage the cells if you drain it to 0%
Click to expand...
Click to collapse
Doesn't hurt a lithium ion battery much at all, it's just another charge cycle.
But if you don't go down to the point that the device shuts off at least once, your battery meter can and often will be off by a good bit. There's never any confirmation. When yours was reading 3%, it might have actually been 8%, or it may have been 1% or less, but until you zero it out, you'll never know, and neither will the device. It'll still know when it's at 100%, but any reading below that can be inaccurate.
And keep in mind, this is NOT zero charge, it is not completely drained (the device does the auto-shutdown specifically to AVOID a complete drain).
ayman07 said:
how often should we condition the battery? (let it drain near 0 and charge up)
Click to expand...
Click to collapse
Lithium Ion batteries don't need to be conditioned. But if you want to calibrate the battery meter, you'll need to do it at least once.
Using my Tab as a 3rd device, with my 1st being a HTC Evo and my 2nd being a Motorola i890, i am very impressed with the battery. Even treating my 1st and 2nd devices as red-headed step children and my Tab being in my hands more then them, my battery is yet to go below 50% in a day, the week i have had it. Even with checking 7 different email accounts every 5 min. Also, my Tab is on Wifi a majority of the day, which i would think puts more of a drain on the battery.
i was a little worried when i found out that the battery was not accessable to be able to swap it out at some point of the day. I have (6) batteries for my Evo, 2 red and 4 blacks. Before my tab, if my evo didnt touch a charger during the day, i would use atleast 4 of those batteries during the day. Yea, the size difference between the Evo and Tab battery is different, so i figured i wouldnt need 5 more Tab batteries, but atleast 1 or 2 extra.
My only complaint with regards to Power/Charging is the length of the USB Charge/Data cable. It is super short. i bought a 6ft extention @ Staples for about $5!
The fresh Tab battery is only spoiling us and will get worse as time goes by. I have been looking for other options in the mean time. Here are a few options i found:
ZAGGsparq 4000 mAh $90 @ fommy
Mophie - Juice Pack Powerstation 3600 mAh $99 @ BestBuy
ClearMax External Battery Pack 5000 mAh $39 @ eBay (questionable)
eGear UB-181 1800 mAh $19 @ eBay
eGear S220 (3-way charge: Solar,ac&usb) 2200 mAh $39 @ eBay
Yoobao YB-602 Power Bank (White or Black) 4800mAh $49 @ eBay
Personally, i think i am going with the Yoobao or Mophie or ZAGG.
***EDIT***
the ZAGGsparq is 6000 mAh, NOT 4000 like i stated above...
Yoobao has only 800 mA of output, too few !
Sent from my GT-P1000 using XDA App
The ZAGG has 2 x 1000 mAh. i wonder what the output is @ 1? I doubt very much that it is 1 x 2000 mAh...
Im impress with the batterry , way much better than my Ipad that I just sold ...
Hello All,
I'm in need of advice if this is down to battery calibration or I have a faulty battery.
I got a replacement Nexus 4 3 days ago and I have been using it as normal. But I have noticed something strange going on with it.
I charged my phone to 100% and put my phone into airplane mode overnight, as I did with my Galaxy Nexus (It saves battery and I have a house phone for emergencies if somebody wants to contact me). I wake up the next morning around 9 hours later, I lose 1% battery which is normal, but when I use the phone for, say, 20 seconds, the battery instantly drains down to 95%. When I turn the screen off, and leave it until I get into work. I get into work 30 minutes later, turn the screen on and use it for a further 40-50 seconds, the battery then goes down to 92%, and the same thing goes throughout the day. I'm currently at 77% which only 12mins screen on time.
Would this be down to calibration? I haven't actually calibrated the battery and I rooted and flashed a custom ROM on the first day.
I had similar issue on my old, broken Nexus 4 so its not a coincidence.
Any help is appreciated.
-N
I wouldn't worry about it. It's common with new phones (and new ROMs mind you) for the battery life reading to be a bit weird. Ultimately you'll still get the same battery life as normal, it's just the reading that will take a little time to become accurate as it calibrates itself.
Try Batterycalibration:
https://play.google.com/store/apps/details?id=com.nema.batterycalibration
When I first got an extended battery for my old Xperia X10 I would often see the battery life *apparently* going up after going down, without actually charging.
OverTheBelow said:
I wouldn't worry about it. It's common with new phones (and new ROMs mind you) for the battery life reading to be a bit weird. Ultimately you'll still get the same battery life as normal, it's just the reading that will take a little time to become accurate as it calibrates itself.
Try Batterycalibration:
https://play.google.com/store/apps/details?id=com.nema.batterycalibration
When I first got an extended battery for my old Xperia X10 I would often see the battery life *apparently* going up after going down, without actually charging.
Click to expand...
Click to collapse
Thanks for this. I'll check it out.
Reminds me about HTC Sensation. It behaved so strangely with the battery readings. Jumped many percentages at once, or stayed at 100% for a while. Also after rebooting, the reading might have been quite different each reboot.
I truly, deeply, did NOT like it. It was horrible to keep track of the real juice level the battery had.
So I wonder if anyone else is seeing this behavior?
weird im getting 2 days usage with average use im really happy with the phone and battery
Fihlvein said:
Reminds me about HTC Sensation. It behaved so strangely with the battery readings. Jumped many percentages at once, or stayed at 100% for a while. Also after rebooting, the reading might have been quite different each reboot.
I truly, deeply, did NOT like it. It was horrible to keep track of the real juice level the battery had.
So I wonder if anyone else is seeing this behavior?
Click to expand...
Click to collapse
Same with me when I had a sensation. It would also randomly turn off.
Sent from my Nexus 7 using xda premium
Nitroz said:
Hello All,
I'm in need of advice if this is down to battery calibration or I have a faulty battery.
I got a replacement Nexus 4 3 days ago and I have been using it as normal. But I have noticed something strange going on with it.
I charged my phone to 100% and put my phone into airplane mode overnight, as I did with my Galaxy Nexus (It saves battery and I have a house phone for emergencies if somebody wants to contact me). I wake up the next morning around 9 hours later, I lose 1% battery which is normal, but when I use the phone for, say, 20 seconds, the battery instantly drains down to 95%. When I turn the screen off, and leave it until I get into work. I get into work 30 minutes later, turn the screen on and use it for a further 40-50 seconds, the battery then goes down to 92%, and the same thing goes throughout the day. I'm currently at 77% which only 12mins screen on time.
Would this be down to calibration? I haven't actually calibrated the battery and I rooted and flashed a custom ROM on the first day.
I had similar issue on my old, broken Nexus 4 so its not a coincidence.
Any help is appreciated.
-N
Click to expand...
Click to collapse
I just thought its normal, for the first couple cycles, and since I flash a rom quite often was hard to pinpoint any of my battery drain problems, eventually though I found that my battery drain issues, were from the CPU not switching back to the 384mhz slot properly, set my min cpu speed with voltage control and now my drain issues are fixed, and I dont have those haywire readings.
OverTheBelow said:
I wouldn't worry about it. It's common with new phones (and new ROMs mind you) for the battery life reading to be a bit weird. Ultimately you'll still get the same battery life as normal, it's just the reading that will take a little time to become accurate as it calibrates itself.
Try Batterycalibration:
https://play.google.com/store/apps/details?id=com.nema.batterycalibration
When I first got an extended battery for my old Xperia X10 I would often see the battery life *apparently* going up after going down, without actually charging.
Click to expand...
Click to collapse
Calibrating the battery with that app does nothing. The reason you see the battery graph go up without charging after usage is because the graph is more of an "estimate". If you are using it extremely heavily for a long period of time it will give an "estimate" of where it is and then when you stop using it, it will realize it is no longer under load and appear to "recharge".
Sent from my Nexus 4 using Tapatalk 2
maniAK- said:
weird im getting 2 days usage with average use im really happy with the phone and battery
Click to expand...
Click to collapse
Is your phone in airplane mode?
Sent from my Nexus 4 using xda premium
Locksmith81 said:
Is your phone in airplane mode?
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
haha nope only have it in 3G if ii used 2G and juicedefender i could probably get 2.5 days out of it then, all i did was 5 complete charges and discharges when i got the phone and only use wall charger not USB charge
How many hours do you end up getting out of it before it dies? And what settings do you get out of that?
I don't pay attention to my battery every few minutes, but look at what I get out of a whole day. Depending on usage, I get 2% to 8% drain per hour. On average, it's closer to 6%. Hope that helps.
The day I calibrated my battery (the second day after I bought the Nexus 4 last week):
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haha, took another half an hour after that of the phone just idling with screen on full brightness till it finally shut off.
OverTheBelow said:
The day I calibrated my battery (the second day after I bought the Nexus 4 last week):
haha, took another half an hour after that of the phone just idling with screen on full brightness till it finally shut off.
Click to expand...
Click to collapse
How do you get it down to 1%? Mine always shuts off when it's about 3% and doesn't let me keep it on.
Just power it back on after shutdown. I get quite about more juice out of it.
BTW, noticed that it uses far less power over the weekend, when at home and constantly on WiFi. I have a feeling the signal amplifier is not very efficient.
Sent from my Nexus 4 using xda app-developers app
Hello all,
I just got my Nexus 2 days ago, and I think that there is something weird about my battery.
First day, with little/moderate use the charge didnt last a day (thats ok, i guess).
But i put it to charge last night, and this morning a found it only at 37%, and when i looked at the battery page, I found this:
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"lightbox_download": "Download",
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}
As you can tell from the screenshot, it was charging for a bit, but then some time later, it stopped charging, and was decharging, while charger was plugged in! Why was that?
And also, as soon as i started using the phone again, that 37% was gone in ~1 hour.
Any ideas what is happening to my phone?
Is it my battery and I need to send the phone for a replacement? (Really dont want to, because I already waited for 2 months... but if it is defected than I will have no choise)
Thanks
phemark said:
Hello all,
I just got my Nexus 2 days ago, and I think that there is something weird about my battery.
First day, with little/moderate use the charge didnt last a day (thats ok, i guess).
But i put it to charge last night, and this morning a found it only at 37%, and when i looked at the battery page, I found this:
View attachment 1671960
As you can tell from the screenshot, it was charging for a bit, but then some time later, it stopped charging, and was decharging, while charger was plugged in! Why was that?
And also, as soon as i started using the phone again, that 37% was gone in ~1 hour.
Any ideas what is happening to my phone?
Is it my battery and I need to send the phone for a replacement? (Really dont want to, because I already waited for 2 months... but if it is defected than I will have no choise)
Thanks
Click to expand...
Click to collapse
Did you happen to lose power at all in the middle of the night?
Sent from my Nexus 4 using xda premium
nbeebe24 said:
Did you happen to lose power at all in the middle of the night?
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
No, because you can still see green charging bar at the bottom...
phemark said:
No, because you can still see green charging bar at the bottom...
Click to expand...
Click to collapse
I meant in your house.
Sent from my Nexus 4 using xda premium
nbeebe24 said:
I meant in your house.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
I think it wouldnt say it was charging, if there was no power in the house, would it?
And just to be clear, i had power when i woke up, so it would show 30mins of charging - but its still going down.
So there was definitely something wrong with the charging process....
Are you charging via USB (PC) or AC (wall)?
UZ7 said:
Are you charging via USB (PC) or AC (wall)?
Click to expand...
Click to collapse
It was AC (wall)
Also, when i got my phone, it was really cold, and i know that cold can be bad for battery. But could it cause permanent damage for it? thats the onyl reason i can think my battery isnt performing well... apart from defect
Once the battery is fully charged, a couple hours at most, it discharges and then won't start charging again till it drops below 90%. Could be the reason for your charging spikes. As far as battery life goes your is pretty typical. I constantly charge my phone, it sits on a wireless charger, but if I try and go all day with a single charge I can barely make it through the day and with heavy use that's more like half a day.
kzoodroid said:
Once the battery is fully charged, a couple hours at most, it discharges and then won't start charging again till it drops below 90%. Could be the reason for your charging spikes. As far as battery life goes your is pretty typical. I constantly charge my phone, it sits on a wireless charger, but if I try and go all day with a single charge I can barely make it through the day and with heavy use that's more like half a day.
Click to expand...
Click to collapse
I would be ok, if it stopped charging when it reached 100%, but i didnt even reach 50%....
Anyway, will test for a few days, and if it still gives me problems will probably need to contact Google..
P.S. my girlfriend got N4 as well, so will compare with hers, if i feel im getting very short battery life.
phemark said:
I would be ok, if it stopped charging when it reached 100%, but i didnt even reach 50%....
Anyway, will test for a few days, and if it still gives me problems will probably need to contact Google..
P.S. my girlfriend got N4 as well, so will compare with hers, if i feel im getting very short battery life.
Click to expand...
Click to collapse
Check to see what is actually using the battery in the stats. Could be a rouge app keeping the phone awake and draining the battery. GSam Battery Monitor gives the best stats but the stock one should give you a clue to what if anything could be draining it.
The same thing happened to my Nexus 4 when I initially got it. I left it to charge overnight and when I awoke it was far below 100%.
I flashed Franco kernel as soon as it was released though, and never got the problem again.
friend'scatdied said:
The same thing happened to my Nexus 4 when I initially got it. I left it to charge overnight and when I awoke it was far below 100%.
I flashed Franco kernel as soon as it was released though, and never got the problem again.
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So this time my battery charged fine, but it didnt last long....
40min of usage drops battery by 30%, is that normal????..
phemark said:
So this time my battery charged fine, but it didnt last long....
40min of usage drops battery by 30%, is that normal????..
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It'll get better. I'm on custom rom and kernel, and today, web browsing on wifi, I have used 21% in 1 hour and 15 minutes, and the phone has been unplugged just over 3 hours.
If the stock ROM doesn't improve significantly over the next few weeks i'd be surprised.
From 40% to 0% in 1 second
This just happened to my Nexus 4 (screenshot)
There was 40% left and all of a sudden the device turned itself off. After restart the battery was completely empty?!?
phemark said:
So this time my battery charged fine, but it didnt last long....
40min of usage drops battery by 30%, is that normal????..
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Click to collapse
You have a Nexus get your phone unlocked and install TWRP recovery (easiest method is Nexus 4 toolkit), download and install Harsh kernel, I guarantee you won't be disappointed with its performance or battery life
Hi
asasione said:
You have a Nexus get your phone unlocked and install TWRP recovery (easiest method is Nexus 4 toolkit), download and install Harsh kernel, I guarantee you won't be disappointed with its performance or battery life
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With all due respect this isn't a kernel/ROM issue, otherwise every single person would be reporting of the battery suddenly depleting in the same way.
Installing another ROM isn't a fix for this sort of problem and just complicates things for the user.
To the OP:
We have two likely issues:
1) Faulty charger
2) Faulty phone.
First off try a different charger, if you don't have one, use your computer's USB port, although note that some computers do not charge while they are off, and the Nexus has a bug where it stops charging if the computer goes to sleep, even though it says it is still charging (it will start charging if you unplug and plug it back into the USB port while the computer is asleep).
Once your phone has charged to 100% from a different charger, if all is fine now it points to a faulty charger, if you still get the same issue, rule out any software you might have installed by doing a factory reset, and try again. If it still happens you simply have a faulty phone and will need to return it.
Regards
Phil