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My dad's Droid 2's battery life just took a nose dive about a week ago. He is running the rooted stock 2.2 rom, few widgets on the home screen, no task killing, and he hasn't gotten any apps in the last month (I don't think he knows how). Did his battery just die (unusable, not no capactity) or is there anything I can try?
What I would do, is tell him to get the battery to where the phone wont turn on anymore, its COMPLETELY DEAD. Plug it into the wall until its 100 percent, then drain it down to about 10 percent, then plug it into the wall again. After another complete charge, it should be good again. Its called reconditioning the battery. I do it about once a month.
boogerburns said:
What I would do, is tell him to get the battery to where the phone wont turn on anymore, its COMPLETELY DEAD. Plug it into the wall until its 100 percent, then drain it down to about 10 percent, then plug it into the wall again. After another complete charge, it should be good again. Its called reconditioning the battery. I do it about once a month.
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Click to collapse
I've heard a lot that Lithium-Ion batteries shouldn't be conditioned too often, because they only have so many charge cycles. I'm not expert though. (Don't let this keep you from trying what boogerburns suggested. I could work for you. I'm just stating that Lith-Ion batteries don't like to be drained a lot)
Anyways, the battery could have gotten a bad cell. You can check the battery condition by opening the dialer, and hitting *#*#4636#*#*
This will bring up a menu, and you can choose battery info (or something along those lines) If battery condition is anything but "good" then he'll probably need a bad battery.
boogerburns said:
What I would do, is tell him to get the battery to where the phone wont turn on anymore, its COMPLETELY DEAD. Plug it into the wall until its 100 percent, then drain it down to about 10 percent, then plug it into the wall again. After another complete charge, it should be good again. Its called reconditioning the battery. I do it about once a month.
Click to expand...
Click to collapse
Well, now it's at a point where the battery is dead in only a few hours, so he's "conditioning" his battery once every few hours.
orkillakilla said:
I've heard a lot that Lithium-Ion batteries shouldn't be conditioned too often, because they only have so many charge cycles. I'm not expert though. (Don't let this keep you from trying what boogerburns suggested. I could work for you. I'm just stating that Lith-Ion batteries don't like to be drained a lot)
Anyways, the battery could have gotten a bad cell. You can check the battery condition by opening the dialer, and hitting *#*#4636#*#*
This will bring up a menu, and you can choose battery info (or something along those lines) If battery condition is anything but "good" then he'll probably need a bad battery.
Click to expand...
Click to collapse
I did check on the battery condition somewhere, and it was "good". However, I was wondering if there's a way to check uptime/awake time on the D2. My Inc had bad battery once, and I knew it was a lemon since the uptime was far more than awake time. I'm afraid that a rogue update is sucking my dad's battery.
How can I check my uptime and awake time?
pianoplayer said:
Well, now it's at a point where the battery is dead in only a few hours, so he's "conditioning" his battery once every few hours.
I did check on the battery condition somewhere, and it was "good". However, I was wondering if there's a way to check uptime/awake time on the D2. My Inc had bad battery once, and I knew it was a lemon since the uptime was far more than awake time. I'm afraid that a rogue update is sucking my dad's battery.
How can I check my uptime and awake time?
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Click to collapse
Use the code I posted earlier, and this time select battery history. Select "partial wake" and see if anything is keeping your phone awake. Also look at network usage and see if anything is using that too much.
Alternately, you can download an app called Spareparts from the market (free) and you can get this information more quickly.
You need to run this app every time you flash a new rom to correct your batterystats.bin file. The batterystats is what dictates how long your phone should be on from the battery. This app deletes the .bin and allows it to be replaced thus conditioning your battery like you were supposed to do when you got the phone. Note: Doing this too many times without flashing a rom or without severe battery drain issues CAN shorten the life of your battery (I know from experience) So please don't do something stupid.
Instructions: Charge to 100%, Run the battery calibration, allow to die COMPLETELY and then recharge to a full 100% (no trickle charging)
Market link: https://market.android.com/details?id=com.nema.batterycalibration&feature=search_result
It's free.
Indirect said:
recharge to a full 100% (no trickle charging)
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so it wont work right if I have an SBC kernel?
You shouldn't need an SBC kernel if you are planning on doing this. However it should still work, just make sure it's at a full 100% oh and also, SBC damages your battery after prolonged use.
Indirect said:
It's free.
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Click to collapse
You're free.
mattykinsx said:
You're free.
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Click to collapse
Only for you Matty.
Indirect said:
You shouldn't need an SBC kernel if you are planning on doing this. However it should still work, just make sure it's at a full 100% oh and also, SBC damages your battery after prolonged use.
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Click to collapse
So we should not get a 10% battery drain from unplugging this if we do this correctly? or this will just prolong the battery life from 90-94% on after unplugging??
I've tried doing this but never 100% fully let it drain and then charged 100% lol...
And do you charge while phone is off? wait until green light comes on?
I'm still getting terrible battery life. 25% drained in 1 hour, and it's just idle with the display on at 50% and wifi/data connection enabled. I have a static background image and I don't have any fancy widgets or anything.
To give more detail, I'm running Synergy RLS-1 (no godmode) with aggressive freedom kernel. I have SetCPU with min/max 128/883.
Well, its going to be a quick drain until a few charge cycles ii got 24 percent drain in 2 hours then it leveled off for me.
Going on 18 hours of battery life if not more right now, I think this works since before, I only had 8-10 hours of moderate use.
17h48m26s
Sent by breaking the sound barrier
jbrawley1 said:
So we should not get a 10% battery drain from unplugging this if we do this correctly? or this will just prolong the battery life from 90-94% on after unplugging??
I've tried doing this but never 100% fully let it drain and then charged 100% lol...
And do you charge while phone is off? wait until green light comes on?
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Click to collapse
I do all of this while the phone is on just to be sure there are no false stats entered. But I'm sure you can charge while it's off.
Update on my battery life: It's probably going to be roughly 19 hours until it dies. 7% and I have 18h 35m 17s So this shows that this works undoubtedly if done correctly.
Indirect said:
You shouldn't need an SBC kernel if you are planning on doing this. However it should still work, just make sure it's at a full 100% oh and also, SBC damages your battery after prolonged use.
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This is an opinion.
I have used SBC for months now and its great.
No damage has been done.
johnylovejoy said:
This is an opinion.
I have used SBC for months now and its great.
No damage has been done.
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Click to collapse
Agreed. Been using an SBC kernal since Feb and not a bit of damage or loss of battery life.
I've never met someone that won the lottery, doesn't mean people don't win the lottery.
Indirect said:
Well, its going to be a quick drain until a few charge cycles ii got 24 percent drain in 2 hours then it leveled off for me.
Going on 18 hours of battery life if not more right now, I think this works since before, I only had 8-10 hours of moderate use.
17h48m26s
Sent by breaking the sound barrier
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Click to collapse
Is it going to gradually increase with each charge cycle, or am I going to notice a big change eventually? I'm on my second cycle (after calibration) and it's still draining like mad. :\
I went a full 19 hours so you should notice a large change eventually if not, I think your battery might be bad?
Alright. I hope that's not the case!
Indirect said:
You shouldn't need an SBC kernel if you are planning on doing this. However it should still work, just make sure it's at a full 100% oh and also, SBC damages your battery after prolonged use.
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No damage whatsoever.
Sugar, Spice, and everything Nice!!!
knowledge561 said:
No damage whatsoever.
Sugar, Spice, and everything Nice!!!
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And you base that on?
mattykinsx said:
And you base that on?
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Polls. Good day.
Sugar, Spice, and everything Nice!!!
knowledge561 said:
Polls. Good day.
Sugar, Spice, and everything Nice!!!
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Click to collapse
I bet if I took a poll on here the overwhelming majority of people would click "no" to:
Do you know someone that has won the lottery?
Doesn't mean it doesn't happen.
The mere suggestion that because something hasn't happened to you, or that some online poll says it hasn't happened so it must not, is absurd. At best.
No, I'm not suggesting that SBC kernels cause phones to explode.
But there's a lot of data supporting the idea that they can cause long term damage.
Battery's are not supposed to be filled and kept at their maximum for a reason.
And that reason isn't because the manufacturer wants your battery to drop to 90% as soon as you take it off the charger.
Hello everyone, I have been reading a lot about people experiencing a random 10% battery drop after charging they're phones. some people have said duh! your not using an SBC kernel. well i'm not using an SBC kernel and i have found a solution to this problem. i will post my solution as well as two other solutions i have found but i personally do not use:
when you charge your battery mainly over night, by the time you wake up you battery says 100% and then shortly after it starts dropping until it hits 85% - 90% battery.
My solution - after your phone has dropped, reboot your phone. after you reboot it charge it again until it's at 100%. now you should be good to go.
if you are not good to go here are some other solutions that might work.
1 - charge your phone while it's turned off
2 - charge your phone to 100% while it's on then turn it off until you see a green light. once you have seen a green light turn it back on and charge it again until it's at 100% battery.
if none of these work calibrate your phone and try any of these steps again. i use an app called Battery Calibrator. https://market.android.com/details?id=com.liteup.calibratebattery&feature=search_result
I could be wrong, but I thought that your battery stops charging once you reach 100%.. and then lets the battery drop down to 90% before it kicks in and starts charging again.
jplowamn said:
I could be wrong, but I thought that your battery stops charging once you reach 100%.. and then lets the battery drop down to 90% before it kicks in and starts charging again.
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You are correct. There a hundreds of posts with dozens of fixes for this. What he is stating has been talked about for months, just not recently as everybody knows about it already.
thanks for the advice
I have a question regarding this issue, hopefully someones got an answer. If I dont use an sbc kernel, I get 10-11% drop in the first 10 minutes off charge. I put my phone on charge at about midnight and take it off at about 5-6 am. If my phone takes 2 hours to charge fully then how in the hell does it drop 10% in that extra 3-4 hours while the screen is off and its still plugged in? I understand that it stops at 100% and then drops to 90%, but why does it drop to 90% so fast?
Yep, when I wake up in the morning I take my phone of of the charger. Then I check my messages, look at my tweets and plug it back in. I go eat breakfast, get ready for work, and by that time my phone has charged back up to 100%. I then take my phone off of the charger and it has a full charge with no drop.
xcpefrmreality said:
I have a question regarding this issue, hopefully someones got an answer. If I dont use an sbc kernel, I get 10-11% drop in the first 10 minutes off charge. I put my phone on charge at about midnight and take it off at about 5-6 am. If my phone takes 2 hours to charge fully then how in the hell does it drop 10% in that extra 3-4 hours while the screen is off and its still plugged in? I understand that it stops at 100% and then drops to 90%, but why does it drop to 90% so fast?
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Click to collapse
I think its the natural discharge rate of the lithium ion battery. Even though its not being used by the EVO, the battery is still discharging because of the internal circuitry and how batteries operate. I'm probably wrong though lol.
xcpefrmreality said:
I have a question regarding this issue, hopefully someones got an answer. If I dont use an sbc kernel, I get 10-11% drop in the first 10 minutes off charge. I put my phone on charge at about midnight and take it off at about 5-6 am. If my phone takes 2 hours to charge fully then how in the hell does it drop 10% in that extra 3-4 hours while the screen is off and its still plugged in? I understand that it stops at 100% and then drops to 90%, but why does it drop to 90% so fast?
Click to expand...
Click to collapse
if you use an sbc kernel then your phone charges to the full 100%, however that is not good for the battery. it can kill your battery really fast or it can last a while so without sbc when you charge your phone to 100% it really isn't charged to the full 100%. which is the diff between sbc and non-sbc
Green_Arrow said:
if you use an sbc kernel then your phone charges to the full 100%, however that is not good for the battery. it can kill your battery really fast or it can last a while so without sbc when you charge your phone to 100% it really isn't charged to the full 100%. which is the diff between sbc and non-sbc
Click to expand...
Click to collapse
Not really. With a stock kernel, the phone will charge to 100% then will stop charging and will let the battery drop to 90% and then start charging again. But, the actual phone doesn't show the drops back down to 90%, it will always show 100%. On an SBC kernel, the phone charges to 100% and then trickle charges to keep it at 100%.
Sent from my PG86100 using xda premium
tgruendler said:
Not really. With a stock kernel, the phone will charge to 100% then will stop charging and will let the battery drop to 90% and then start charging again. But, the actual phone doesn't show the drops back down to 90%, it will always show 100%. On an SBC kernel, the phone charges to 100% and then trickle charges to keep it at 100%.
Sent from my PG86100 using xda premium
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Click to collapse
but i've also heard on a stock phone when you'r low on batt. like 30% below your batt. begins to drop semi-faster than normal so would that be the same as the 10% drop? just the for us we see it immediately?
Green_Arrow said:
but i've also heard on a stock phone when you'r low on batt. like 30% below your batt. begins to drop semi-faster than normal so would that be the same as the 10% drop? just the for us we see it immediately?
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Click to collapse
Not the same from what I have read. I had the same issue with stock on my EVO 4G where the last 20-30 percent of battery was horrific. I rooted and did a battery calibration and it corrected my issue.
I will try this out
tgruendler said:
Not the same from what I have read. I had the same issue with stock on my EVO 4G where the last 20-30 percent of battery was horrific. I rooted and did a battery calibration and it corrected my issue.
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exactly but w/o rooting and calibrating it, it sucked in the last 30%
Blaster0007 said:
I will try this out
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Click to collapse
let me know how it goes ^_^
Green_Arrow said:
if you use an sbc kernel then your phone charges to the full 100%, however that is not good for the battery. it can kill your battery really fast or it can last a while so without sbc when you charge your phone to 100% it really isn't charged to the full 100%. which is the diff between sbc and non-sbc
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Click to collapse
That's total bull. It does not harm the battery or the phone at all ever. Also, your miracle solution is a year an half old, welcome to late June 2010...
MCL1981 said:
That's total bull. It does not harm the battery or the phone at all ever. Also, your miracle solution is a year an half old, welcome to late June 2010...
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From an electronic standpoint, you can't say it doesn't hurt the battery but making it retain a charge it was designed to drop. But yes, there really isn't need for the "scare" that was associated with sbc long ago, as the methods have been refined, and haven't heard an 'sbc war story' in some time now.
teh roxxorz said:
From an electronic standpoint, you can't say it doesn't hurt the battery but making it retain a charge it was designed to drop.
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Click to collapse
And you can't say it does hurt the battery either. And given there is no evidence whatsoever of it hurting it.....
teh roxxorz said:
From an electronic standpoint, you can't say it doesn't hurt the battery but making it retain a charge it was designed to drop. But yes, there really isn't need for the "scare" that was associated with sbc long ago, as the methods have been refined, and haven't heard an 'sbc war story' in some time now.
Click to expand...
Click to collapse
so is there no downside now to using sbc?
I have been using sbc on my seidio 3500 battery since it was introduced. Except for a month when I started using Synergy. No drop in usage time at first but over that month my battery went to ****.
I have since installed boot manager and have Synergy as my main ROM, and at night i switch to Warm 2.2 rls5 with a netarchy sbc kernel and charge using that. Which is now every other day. My battery is still going strong and lasting as long as ever.
Sent from my PC36100 using XDA App
Green_Arrow said:
so is there no downside now to using sbc?
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Click to collapse
Nope. None that I'm aware of or have experienced.
When my phone is fully charged or has 70 or 60% remaining battery it seems to drain as normal, around 2-5% over a 10 hour or so period...
However, I've noticed once the battery decreases below 50% it drains FAST, why?
Anyone else noticed this? Test it for yourselves, monitor the TIME it takes to decrease from 100 to 50% and then from 50% to 0.
Yesterday I forgot my phone in the car whilst going to work. It was turned on however it was sitting all day in the car.
Once I returned from work I was shocked to find the phone would not turn on.
At first I thought there was a problem or some kind of fault. Once I plugged in the charger it started to charge, the battery cut and the phone automatically turned off!
I remember the phone had around 48% battery remaining, no wifi or 3g or data turned on. It was simply idling...
So the question is HOW can the battery drain from 48% to 0% over a 10 hour period without being used???
Should my battery of been ANYTHING over 50% it would only lose a few percent...
Same thing for me. (Samsung Galaxy Note N7000 - stock Android 2.3.6)
Battery slowly decreases from 100% to ~50% and then ~2x faster.
I charged the note on my computer and then switched to the charger (at ~60% of charge).
I'm no expert of battery charging etc. but just remembered my iPhone 3GS discharging faster when charged on the computer than with the charger.
If it's the same for the note, some cells could discharge faster because charged on the computer.
Can someone confirm this (or not) ?
How did you charge your phone ?
boubou2k said:
Same thing for me. (Samsung Galaxy Note N7000 - stock Android 2.3.6)
Battery slowly decreases from 100% to ~50% and then ~2x faster.
I charged the note on my computer and then switched to the charger (at ~60% of charge).
I'm no expert of battery charging etc. but just remembered my iPhone 3GS discharging faster when charged on the computer than with the charger.
If it's the same for the note, some cells could discharge faster because charged on the computer.
Can someone confirm this (or not) ?
How did you charge your phone ?
Click to expand...
Click to collapse
Same thing happnd with me, and charging my phone thru electric charger..
So it seems this behaviour happens to several other Note users, why?
It's a problem knowing that having around 50% left in your battery will struggle to make it through the day with little to no use...
Have you people set the wifi to turn of while the screen is off? This is unnoticeable in the daily use, but increase the batterytime massively. The setting for this is hidden, you have to push menubutton while in the wifi-settings.
Here I thought I was only imagining things about the battery life dropping faster once it has reached 49% or less.
EarlZ said:
Here I thought I was only imagining things about the battery life dropping faster once it has reached 49% or less.
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Haha, nice to know I'm not the ONLY one facing this bug...
I can only hope Ice Cream Sandwich solves this battery drain issue.
Hmm, i think i have the same problem, but i'm not sure. Will get back to this thread when i've investigated a little bit.
This may be a typical samsung issue.
I remember when i had the spica , the battery percentage lining in kernel was totally wrong. I think its done on purpose so you would feel like you have more battery life. 75 % of the battery drains slow. And the rest 25 super fast. Can be fixed within kernel.
Sent from my LG-P990 using Tapatalk
I believe its just a placebo effect. Battery usage always depends on so many factors its a pain to even consider starting looking for the issue.
Being on stock KK5 not rooted, i cannot report the same. I only see "fast battery drain" at the last 4-5%. If you feel its an issue, could you post the firmware version you are on and the battery stats graph just for reference?
Placebo or not its something I can definitely feel on my Galaxy Note.
EarlZ said:
Placebo or not its something I can definitely feel on my Galaxy Note.
Click to expand...
Click to collapse
When you get the chance, could you post the battery stats graph please? what we should see is a (lets say) 30 degrees angle and at about halfway it gets steeper.
I know its quite hard to demonstrate the issue, but if you lets say use wifi to browse the first 50% in text only sites and then visit youtube for the last 50%, it won't help the test.
A nice way to test it would be to charge it to 100%, then load up a long movie and repeat playing it till the battery is 2-3%. Then post the results.
roxxy said:
Have you people set the wifi to turn of while the screen is off? This is unnoticeable in the daily use, but increase the batterytime massively. The setting for this is hidden, you have to push menubutton while in the wifi-settings.
Click to expand...
Click to collapse
When the Wifi is disconnected, the 3G scanning will get on. Isn't that defeating the purpose?
Sent from my GT-N7000 using Tapatalk
Hey there!
I would suggest to load the battery 100%, plug it out, go into recovery and wipe battery stats.
I have to admit that I don´t know exactly what this workaround does, but I read about it in another forum...and it worked for me, my battery status is much more accurate now!
JulyDerek said:
When the Wifi is disconnected, the 3G scanning will get on. Isn't that defeating the purpose?
Sent from my GT-N7000 using Tapatalk
Click to expand...
Click to collapse
Wifi will continue to scan for wlans near it every second or so
Sent from my GT-N7000 using Tapatalk
I'm back. I've had the Diagnosis app running for the past hour, and i got some interesting results.
---Wiping battery stats does not help---, a full charge automatically causes battery stats reset.
I full charged mine with the electric charger after fully discharging it without turning it on.
This time i didn't notice any change in discharge speed between 100%-50% and 50%-0%.
Last time I charged the phone it was not fully discharged. Charged it from 30% to 50% then 50% to 75% on the computer, and 75% to 100% using electric charger.
It's just a supposition, but maybe doing several partial charges while using the phone makes the battery % information inaccurate (wrong battery stats?).
[Edit]In this case, wiping battery stats should show accurate battery %. [/Edit]
I had a similar problem, and I think it is to do with some incorrect scaling or measurement.
I was down to 28%, and it seemed to be draining fast even though I was not using it. I rebooted (I love how quick that is after my Arc was so slow). On restart it was at 17% ! The usage graph just did an instant drop.
I also had another occasion where it remained at 100% for 2 1/5 hours of use.
I assume some calibration issues caused the meter to read the battery wrong. I am turning off on the w/e overnight (when I do not need the alarm) to see if a slow (180 mA) charge while off will help. I may even get a decent alarm clock so I can turn the phone off at nights and charge. I spend too much time in the morning checking my email and reading news!
What is more consistent on mine is that when the battery drops to 9% or less the loss is like 1% per ~10-15% and this is with wifi/3g off, phone locked.
I'm back again. I've had some serious battery drain the last couple of days, but i noticed that Auto Sync was enabled. Once i deactivated it it got much better. Pulled the phone from the charger 9 hours ago and i'm at 90% battery left. I've sent some SMS, a few calls and that's about it, but it doesn't drain while it's in standby now, so i'm happy with it.
Guys last 1-2 week i started having battery problems. My phone dies when 10% battery left and when it has full battery it shows 89-95 etc i tried everything but nothing fixed the problem. Tried *#0228# code and didnt help and its not rooted so i cant use calibration apps. Only pulling the battery out solves it but after 1 usage it happens again. And its weird my 2 other note 4 user friend also started having this problem in same time any1 else has this problem or any1 knows how to fix it properly?
Sounds like a dead battery to me.
If the phone shutdown at 10%, it's probably because the voltage delivered by the battery is too low.
But the fact that your friends have the same problem is pretty strange. An app maybe ?
alex9898 said:
Sounds like a dead battery to me.
If the phone shutdown at 10%, it's probably because the voltage delivered by the battery is too low.
But the fact that your friends have the same problem is pretty strange. An app maybe ?
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Click to collapse
Dont think its an app and dead battery. Btw it doesnt only die at 10% sometimes 5% sometimes 7% its random. I think its just wrong calibration but it happens usually. Maybe fast charge effects battery dunno but its very annoying.
Defect charger that you both share? That ofc killed your batteries
Braxos said:
Defect charger that you both share? That ofc killed your batteries
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Click to collapse
Every1 uses their own charger. And im pretty sure my battery isnt dead i can still get 6 hours sot easyly.
im having the same problem.. it dies on me at 10%... last time on 20% cause i was like skypeing on 3g network for the last hour or so.. i got the phone SH so.. maybe replacing the battery will fix this?