Charge phone while watching movie, bad for the battery?

Charge phone while watching movie, bad for the battery? - Touch HD General

Is there any harm done if I charge the phone while watching movies on the phone? I mean, will the battery suffer from it so I get less hours out of it when it's fully loaded and such?

ArtieQ said:
Is there any harm done if I charge the phone while watching movies on the phone? I mean, will the battery suffer from it so I get less hours out of it when it's fully loaded and such?
Click to expand...
Click to collapse
Always best practice to charge phone when its turned off, or at least in standby, though a lot of business users would charge phone while its docked or sitting on computer desk sync'ed to pc via activesync & usb cable and they suffer no real loss on battery power. So I can't see any reason why you couldn't charge phone while watching movies, if anything it should allow you to watch them without your battery running out.
If you feel that you have lost battery strength over a period of time, try charging phone again whilst turned off for a few days and you should see your consumption return to normal.

Related

Bad Battery! - Possible cause?

Hey guys,
First of, YES I USED THE SEARCH FUNCTION .
My battery life is absolute horrid right now, and I tried everything.
I tried out different roms, every radio, deleting programs, hard resetting tons of times. I even bought a new 1500 mAh battery but it was still crap.
Battery log says my device in standby mode with the screen turned of uses -70ma, when I turn my screen up it jumps to -320ma, and when idle on the screen for a few sec it goes to -200 ma, but when I browse through stuff again it goes to 3xxma again. When I surf on the internet it picks up to 450-500ma.
Now, this morning with the 1500 mAh battery fully charged I played a few games of XTRAKT, few texts, 1 hour of music listening and 10 minutes of being on Opera through a HSDPA connection. It was down to 45%.
This isn't the normal rate the battery goes down at right?
I use HDtweak to manage my connection and put it off after a minute so it isn't that I keep dataconnections open. I never use bluetooth or wifi either.
Could it possibly be that it's the charger of the device? I perhaps have the feeling that it doesn't put enough juice into the battery even though the green light led goes on to indicate it's full.
Some feedback would be much appreciated cause it's put me on the edge of selling my device, which would be a shame cause I'm really fond of it (except the battery ofcourse ).
Thanks in advance!
/a
P.s. I am from a pda background, so it isn't that I'm expecting too much of the device or comparing it to a normal cell.

May I ask what you searched, as there are 3 or 4 active threads on battery drain right now?

Hi
Had same problem.
Try to browse a storage card if its very slow You must format it and it will back to normal.
very strange but its working.
Cheers

AndyCr15 said:
May I ask what you searched, as there are 3 or 4 active threads on battery drain right now?
Click to expand...
Click to collapse
General battery drain yes, not the possible issue of a charger though. If I'm wrong I stand corrected. .
Hi
Had same problem.
Try to browse a storage card if its very slow You must format it and it will back to normal.
very strange but its working.
Cheers
Click to expand...
Click to collapse
I'll try this, I have noticed that today my storage card won't be read by my computer, so perhaps this is a fix for the lousy battery issue.

antrak said:
Hey guys,
First of, YES I USED THE SEARCH FUNCTION .
My battery life is absolute horrid right now, and I tried everything.
I tried out different roms, every radio, deleting programs, hard resetting tons of times. I even bought a new 1500 mAh battery but it was still crap.
Battery log says my device in standby mode with the screen turned of uses -70ma, when I turn my screen up it jumps to -320ma, and when idle on the screen for a few sec it goes to -200 ma, but when I browse through stuff again it goes to 3xxma again. When I surf on the internet it picks up to 450-500ma.
Now, this morning with the 1500 mAh battery fully charged I played a few games of XTRAKT, few texts, 1 hour of music listening and 10 minutes of being on Opera through a HSDPA connection. It was down to 45%.
This isn't the normal rate the battery goes down at right?
I use HDtweak to manage my connection and put it off after a minute so it isn't that I keep dataconnections open. I never use bluetooth or wifi either.
Could it possibly be that it's the charger of the device? I perhaps have the feeling that it doesn't put enough juice into the battery even though the green light led goes on to indicate it's full.
Some feedback would be much appreciated cause it's put me on the edge of selling my device, which would be a shame cause I'm really fond of it (except the battery ofcourse ).
Thanks in advance!
/a
P.s. I am from a pda background, so it isn't that I'm expecting too much of the device or comparing it to a normal cell.
Click to expand...
Click to collapse
Hi Antrak,
Touch HD has the longest battery life of any similar 'phone. See e.g.
http://www.pcauthority.com.au/News/1...-the-rest.aspx.
Either your battery is not charging correctly, as you say (try it via the PC USB cord?), or you have two dud batteries in a row (very unlikely) or you have a bug in your m/board. 70mA in standby is too high. It should be <20mA with only the 'phone on in standby mode, providing you are not moving from one cell to another all the time, and have decent signal.
One other suggestion. Drain the battery completely to zero, then recharge it to max. This should reset the internal battery meter. But don't do this too often, as it ages the battery faster.
If none of these work, return the 'phone for a m/board replacement undere guarantee.

I have the same problem... After charging for 10 hours, my batt shows 55% only.. and last 1hr on STANDbY!!!
IMAGINE! charge for 10hrs juz to get to use for 1 hr.. im disappointed by the batt.. im not sure if HTC is gona let me exchange with a new one or do I have to buy a new batt..

try check your sync..its active all the time or not..
if yes..
find the threat to make a fake account for sync, so you can active it manually.
so your battery will stand more longer,
about charging..
me also facing the same problem..
need to change it more longer to get full battery,
but
if i change in my car,
no issue
very fast
i thing charger issue..
but i bought original set..
??????????????????

Okay I've charged my HD through my pc with a USB cable and formatted my SD card like a other user said. Gonna see how it holds out today. It could very well be that some chargers have issues.

My experience with the Touch HD says that when charged with a USB attached to a computer the battery life is a lot shorter than charged through a wall socket.

jouh said:
My experience with the Touch HD says that when charged with a USB attached to a computer the battery life is a lot shorter than charged through a wall socket.
Click to expand...
Click to collapse
This is always going to be the case. Quickest way to charge your device will always be through your wall socket and with your device turned off!!

Same battery issue.
i recently purchased a new touch HD (T8285 telstra version) and am experiencing the same horrible battery issues. it takes more time to charge it, than i get use out of it.
i've tried multiple batteries, and am in the process of trying different ROMs.
antrak: any update on that last post? did the SD format help?

Fallen Spartan said:
This is always going to be the case. Quickest way to charge your device will always be through your wall socket and with your device turned off!!
Click to expand...
Click to collapse
Indeed, here's an illustration...
Image1:
Charging via USB takes longer. Consumption and therefore charge current is erratic after the battery level reaches 50% when charging via USB on my HD. So the battery fills up to about 60% of its capacity by the time when the battery level is reported to be 100% and charging stops.
Image2:
When charging with an AC adapter this is not happening and the capacity is fully utilized. This is also quicker.

Fallen Spartan said:
This is always going to be the case. Quickest way to charge your device will always be through your wall socket and with your device turned off!!
Click to expand...
Click to collapse
That's strange. For me it's quicker if the device is turned on. When it's off it takes around 8-10 hours to charge but when it's on it's alot quicker.

trice1921 said:
That's strange. For me it's quicker if the device is turned on. When it's off it takes around 8-10 hours to charge but when it's on it's alot quicker.
Click to expand...
Click to collapse
hmmm, I don't know how this is possible?
If your device is on there is always power outage especially with programmes running, whilst if your device is off, there is no power drainage so device should charge quicker.
What rom are you using? software installed?

Fallen Spartan said:
hmmm, I don't know how this is possible?
If your device is on there is always power outage especially with programmes running, whilst if your device is off, there is no power drainage so device should charge quicker.
What rom are you using? software installed?
Click to expand...
Click to collapse
Latest official rom with alot of software installed. But it doens't make sence to me either. It's logical for something to charge faster when it's using no power (off) then when it is using power (on).

Combine battery threads ???
Hi to Moderators,
There are now several threads on the HD forum on battery and charging issues.
Can these be combined into one place and stickied, so we can get a clear picture?
Current threads are this one, plus:
http://forum.xda-developers.com/showthread.php?t=474531
http://forum.xda-developers.com/showthread.php?t=506658
http://forum.xda-developers.com/showthread.php?t=480618
I have a gut feeling from what I'm reading, that HTC have had a bad batch of batteries or charger circuits in the HD - in which case the best starting point is to call their service points and ask for help/replacement, instead of spending lots of time on other remedies. The symptoms described have lots of commonalities, and the HD is normally an excellent beastie for battery usage.
Thanks for all your help, ladies and gents! Your work is much appreciated.

nerdcore said:
i recently purchased a new touch HD (T8285 telstra version) and am experiencing the same horrible battery issues. it takes more time to charge it, than i get use out of it.
i've tried multiple batteries, and am in the process of trying different ROMs.
antrak: any update on that last post? did the SD format help?
Click to expand...
Click to collapse
Heya,
Don't know what it is but my battery life increased a tad. Am running Dutty's X3.0 with the 1.32.x.x. radio. Watching a 1 hour xvid dvd rip (no conversion) in coreplayer on full backlight with no HSDPA on, wifi or bluetooth takes away 20% of my battery, which is acceptable.
Don't think it's the SD card format though, it might be that I never have the activesync process on anymore by setting it to manual update and closing it (it otherwise keeps running.)
/a

got htc hd2 2days ago had to charge 4times

hi all i have had to charge this phone so much its kinda doin my head in, last night i charged it and took it off at 6pm fully done and my 11pm after taking approx 30pics + 4vids(4min long each) it was down to very low life.
so i chargeed the battery fully again, and this time from 8am ~ 10am today my battery is at 77% i have done sofar
*backlight set @ 30%
*hspda ON
*Weather, facebook download every 1 hour;
*1call, 5min
*3 SMS got, 5 SMS sent
*1hours playing with phone (general settings)
*took 10 photos
*took 1 vid 3min long
from 100% to 77%,

Simple, turn off 3G. On regular GSM my phone was at 37% after 12 hours with at least 30min talking, lots of browsing, emails, texting, and 30 minutes GPS.

Simple, turn off 3G. On regular GSM my phone was at 37% after 12 hours with at least 30min talking, lots of browsing, emails, texting, and 30 minutes GPS.
Click to expand...
Click to collapse
did u run with 3g/hspda on before and did it improve alot or not, as i use net alot and really nead hspda

TBH I doubt you are fully charging in 2 hours. The iPhone is the same, fully charging is not till the meter says 100%, that is more likely 80%.
The battery meter may also need calibrating. Personally I would drain the battery dry by running videos etc, and then charge it back up and leave it charging overnight.

Gajet said:
TBH I doubt you are fully charging in 2 hours. The iPhone is the same, fully charging is not till the meter says 100%, that is more likely 80%.
The battery meter may also need calibrating. Personally I would drain the battery dry by running videos etc, and then charge it back up and leave it charging overnight.
Click to expand...
Click to collapse
i charge it alot longer till green light came on not two hours matey, it took two hours to lose that much life lol
ps. i will run a satnav a few hours should run life down and then recharge

My battery was draining fast too. I realised it was because it would stay connected to my data (mobile web for O2 in my case) and never disconnect. I only clicked on the notification bar and saw i was connected to my data for over 1 hour and half. That is a big battery drain. Don't switch to gsm mode - that would suck. What is the point of having such a high end phone and use it in gsm mode?
All I can suggest to you for the time being (until someone figures out how to have data connections auto disconnect after a couple of minutes) is to disable auto downloads for the following:
facebook, weather, mail, stocks, time sync, twitter etc.
You now have to check manually these items. Sucks i know but only way for me to not stay connected to data and drain my friggin battery

That happens to me too..I have everything set to update manually! No internet time no twitter,weather etc..And no other apps!!! And it still connecting by itself and stays this way for hours till i notice it!! Any ideas of what does it try to update??
(dont tell me the obvious ones!!)

My battery was draining fast too. I realised it was because it would stay connected to my data (mobile web for O2 in my case) and never disconnect. I only clicked on the notification bar and saw i was connected to my data for over 1 hour and half. That is a big battery drain. Don't switch to gsm mode - that would suck. What is the point of having such a high end phone and use it in gsm mode?
All I can suggest to you for the time being (until someone figures out how to have data connections auto disconnect after a couple of minutes) is to disable auto downloads for the following:
facebook, weather, mail, stocks, time sync, twitter etc.
You now have to check manually these items. Sucks i know but only way for me to not stay connected to data and drain my friggin battery
Click to expand...
Click to collapse
ok sounds like a good plan matey, im currently playing a video over and over to kill my battery 0% then im going to charge from no power while phones turned off, 5% life left lol....common...
i keep getting message battery low may lose data is this true will i lose data on my fone?

on the old PDA's if you drained the battery ( <1% or something like that ) your data can be gone, its like performing a hard-reset... don't know how it is now though... propably its safe, or it turns off before 0%

br3nt said:
on the old PDA's if you drained the battery ( <1% or something like that ) your data can be gone, its like performing a hard-reset... don't know how it is now though... propably its safe, or it turns off before 0%
Click to expand...
Click to collapse
You don't have to worry about that any more. A different type of memory is used. You can even take the battery out and leave it for days and all your programs and data are still there.

ok people i completely deaded the battery till it wouldnt turn on and started it charging at 15:43, its now 17:00 and still showing orange led light so i will keep checking every 15min to find out...
1) how long to charge from total flatnesss
2) how long battery last tomorrow on full charge from now to when it conks out again
will keep you updated

just for information: HD2 has a battery that needn't get totally depleted to get the full charging cycle like on older battery packs. On the contrary, the battery suffers when completely discharged. It is recommended not to leave it till the phone dies, this reduces the battery life. Charge it whenever possible. I have mine in active dock when driving in car, as well as when in office. I know the battery life could be better but well...

dusanko said:
just for information: HD2 has a battery that needn't get totally depleted to get the full charging cycle like on older battery packs. On the contrary, the battery suffers when completely discharged. It is recommended not to leave it till the phone dies, this reduces the battery life. Charge it whenever possible. I have mine in active dock when driving in car, as well as when in office. I know the battery life could be better but well...
Click to expand...
Click to collapse
i dont mean to say ur lieing or anything but do u ave evidence of this, as so many have told me to totally deplete the battery every time, in a few forums around the net

DAMIEN123_666 said:
*took 1 vid 3min long
Click to expand...
Click to collapse
I would imagine video recording puts quite a strain on the battery.
Also don't forget that gorgeously massive screen runs from a 1200mAh-ish battery. I have the Xperia X1, with a 1500mAh battery. When I get the HD2 I can't help but feel there just won't be enough juice to go around.
Lower battery capacity + bigger screen = ever-so-slight reduction in battery.
I wonder whether captive or resistive screens take more power?

I'm using wi-fi at home for all data and the battery is lasting forever!
Strongly recommend tying this - see if it works for you?

ok all i have the full charge time of the battery, from complete flaness 0% life to full charge 100% life time taken
start 15:43 ~ finish 18:12 = TOTAL 3:19min.
now i will take note of all i do on the device and post results tomorrow or the next day if im lucky and it last that long lol

DAMIEN123_666 said:
start 15:43 ~ finish 18:12 = TOTAL 3:19min
Click to expand...
Click to collapse
Also the way you charge your battery affects the charge time.
Example:
- Charging through phone using stock charger
- Charging through phone using third-party charger
- Charging using a short USB connection
- Charging using a long USB connection
- Charging through phone with phone off
- Charging through phone with phone on
- Charging through official external battery charger
- Charging through third-party external battery charger
Sometimes stock accessories are slower, others, not so. Some manufacturers refer to a "power charge", for example some Sony Walkmans. For that to work though the phone / device has to be off. Thats how they get those 3min = 3hr charge times.

DAMIEN123_666 said:
ok all i have the full charge time of the battery, from complete flaness 0% life to full charge 100% life time taken
start 15:43 ~ finish 18:12 = TOTAL 3:19min.
now i will take note of all i do on the device and post results tomorrow or the next day if im lucky and it last that long lol
Click to expand...
Click to collapse
Erm that's not what I advised. The aim was to re-calibrate the battery meter. All you have done is wait till the batery meter says 100%, whether in reality it's 80%, 75% or whatever. A full overnight charge would have guaranteed that 100% = 100%.
I don't see what you've done other than continue to use it the same as you already were.
I said I doubt you can get 100% in 2 hours, 3:19 isn't much more.

DAMIEN123_666 said:
i dont mean to say ur lieing or anything but do u ave evidence of this, as so many have told me to totally deplete the battery every time, in a few forums around the net
Click to expand...
Click to collapse
No he's right, completely draining the battery isn't good and shouldn't be done too often. regularly topping the battery up is the way to go.

Gajet said:
Erm that's not what I advised. The aim was to re-calibrate the battery meter. All you have done is wait till the batery meter says 100%, whether in reality it's 80%, 75% or whatever. A full overnight charge would have guaranteed that 100% = 100%.
I don't see what you've done other than continue to use it the same as you already were.
I said I doubt you can get 100% in 2 hours, 3:19 isn't much more.
Click to expand...
Click to collapse
hi i plan to monitor usage till battery drops dead and then tomorrow night or the net if im lucky i will redo the recharge test over night

Nexus One Battery Charging

Greetings all, I was wondering if anyone else has noticed that their battery doesn't charge to full when using the wall charger or USB? I have LiPo chargers from RC cars and I have used one to discharge and fully charge the battery to 1400mah and found that the phone seems to have much better battery life than when charged with wall charger / USB.
When charged with the external ("direct") battery charger, I can get to 4211mv whereas normally with the wall/usb it only goes to 4173mv max. From what I know of LiPo/LiIon batteries, they need to get to their max charge voltage (~4200mv) or so and stay there for some time to get full charge.
I have noticed that my phone has terrible battery life when compared to my Touch HD which used to get 20hrs+ of full use on 3G/HSDPA, same usage pattern with push e-mail and I can't even get 12hrs with the Nexus One before the battery runs right down. And I thought the Touch HD had bad battery life!
Any help / feedback would be most appreciated. Thanks!

It's interesting I see this as today has been a very odd battery day. I woke up and unplugged it at exactly 5am. For 7 minutes I checked e-mails and twitter and it had dropped 3%!!! By 8am I was down to 82% (ride in to work, listening to music for 25 mins, thats about all) I was thinking this was getting silly. It's now 5pm here and I'm still at 61%?!?! So, over the first 3 hours it went 6%ph, since then it's done 2.3%... that's the best I've ever got from it.
Could this be related? It's not really fully charged, even though it shows 100%, drops very quickly and then when it returns to where it perhaps should be (around 80%) it acts as normal?
What is a LiPo charger and how can I use one to charge my Nexus battery?

http://blog.quantifly.com/?p=2
iMAX B6 is what I have been using. I have another heavier duty one but this one is good enough for the battery. I have a generic battery charger thing which I got from China which holds the battery while the other unit charges it. Right now as I write this, my phone has been on for 1hr 25minutes after being charged with the charger, I have used the browser for 10minutes, on 3G, downloading things etc. and it is still on 4211mv and 100% charge.
Curious if this is an issue with the onboard battery microchip, or the radio/firmware. Does anyone know where to source an original replacement battery (non-generic replacement)?

The batteries in these smart phones makes no sense. The other day, I charged the phone overnight using USB, and the next day, I was at 97% after 3.5 hrs. Then, another day, with basically the same usage, I'm down to 85% after 3.5 hrs. No rhyme or reason. I wish someone could explain it.
I also wish someone could make a battery that lasts for 48 hours on normal use

"Drops very quicky"
same here but ive had this 'problems' since stock firmware. its not CM related.
I also noticed that its dropping from 100 to 80ish very fast when starting many apps in the morning for example. Like stopping airplane mode, starting some apps and opening browser. stays at 80ish for some hours then

xPatriicK said:
"Drops very quicky"
same here but ive had this 'problems' since stock firmware. its not CM related.
I also noticed that its dropping from 100 to 80ish very fast when starting many apps in the morning for example. Like stopping airplane mode, starting some apps and opening browser. stays at 80ish for some hours then
Click to expand...
Click to collapse
Yep. That was the same thing with my Pre. It would never stay at 100% for more than a few minutes, and then it would plummet into the 80's, and then it would be okay.

Battery Antics
I purposely left the phone not to charge last night from about 1AM - and I woke up (around 9:30AM) with it at 99% charge still. Used it for a bit and it dropped to 89% and now it's 1:06PM and it dropped to 75% with calls, web browsing and some other stuff. Previous days to this it would be at 75% after just 2-3 hours!
I also noticed that the phone didn't download any e-mails overnight (since there's no "scheduling" for peak/offpeak like in WM I assumed this shouldn't happen?) which may account for the minimal discharge.
All in all very strange, seems like I am not the only one with these problems - maybe I'll try get another battery and see what happens!

The thing about the battery in a smart phone is that it has a micro chip in it, and the phone reads info from it to give us the battery meter(this is true of any phone, actually)... your LiPo charger reads charge in a similar manner, only it doesn't talk with the batteries chip, instead it does it's own thing(I will spare the details)
With this in mind, what you want to do to get the most out of your battery is get the chip in the battery, and in turn the "circuit" it completes with the phone properly calibrated. To do this, you want to run the phone's battery down until it turns itself off. Do a battery pull and let it sit for a little bit (at least 30 seconds, I usually wait several minutes)... then, put the battery back in, and turn the phone on. One of two things will happen, it will either power off before fully booting, or if it does not you will want to use the phone until it powers off again.
At this point, pull the battery again and let it sit out of the phone for a bit again. Then put it back in, and without trying to power the phone on, put it on the charger and leave it on the charger until it is fully charged "green light comes on" plus a couple hours.(best to leave it on the charger overnight) At this point, take it off the charger, and then turn the phone.
This will properly set the low point and the high point for the battery stats. Do not do this a lot, it is bad for a LiIon battery to be "deep cycled", which this comes really close to doing. Ultimately, the phone is not going to charge the battery as high as a LiPo charger will, nor will it discharge it as low, because unlike an RC car's batteries that are used for rapid discharge, these batteries are designed and used in a slow long term discharge.

Thanks, I'll try that myself
Do you run any risk of damaging the battery when charging with a LiPo?

How to Make Your Cell Phone Battery Last Longer when you need it the most
Tips: How to Make Your Cell Phone Battery Last Longer when you need it the most:
1. Always try to drain your battery or wait till its 15% or below then charge your phone. Its very important to turn the phone off before you plug it to charge. This help maximizing your battery charge.
2. Stop searching for a signal. When you are in an area with poor or no signal, your phone will constantly look for a better connection, and will use up all your power doing so.
3. Switch off the vibrate function on your phone, and use just the ring tone instead.
4. Turn off your phone's back light.
5. Avoid using unnecessary features. If you know it will be a while before your phone’s next charge, don’t use the camera or connect to the Internet. Flash photography can drain your battery especially quickly.
6. Keep calls short. This is obvious, but how many times have you heard someone on their mobile phone say, "I think my battery’s dying," and then continue their conversation for several minutes? Sometimes, the dying battery is just an excuse to get off the phone (and a good one, at that), but if you really need to conserve the battery, limit your talk time.
7. Turn off Bluetooth. It will drain your battery very quickly.
8. Same goes for WIFI, GPS, and infrared capabilities, if your phone has these features built in. Keep them off; save more power.
9. Use GSM - Using your phone in 3G / Dual Mode will drain the battery quicker than if you just use GSM mode - have a look at your phones spec and you'll see it will quote two different battery life times - normally 50% more for pure GSM use.
Very Important:
Anyone purchase a new phone. Its best DO NOT USE the phone with the little remaining power the battery has. It is best that you put the battery in the phone and turn off the phone and change for minimum of 5-6 hours.
The 1st charge for the battery is very important for lithium ion battery. Leaving the phone off will give the full maximize charge the battery can take. Normal when phone shows charge complete by integrator light or on the screen means its 95% complete. To complete the 100% charge you need additional 1-2 hours after the full charge integrator show. Having the phone off also help keep the charge. A phone that is on and charging will never get that 100% charge because there is alway a little battery being drained just because the phone is one even if its plugged in to a charger.
If you see your battery is not giving the same performance what it use to. You can try this method at least 3-4 times for 1 week and follow up every other month. Meaning turn the phone off and charge it every night. It is best if you can drain the battery to 15% or less before charging the phone.

So one person says don't let it drop down low very often, the next person says let it drop to 15% all the time...
Personally I've heard not to let it drop low more often these days. The old 'let it decharge regularly' was talked about a lot 4 or 5 years ago... no?

nuc70st said:
Tips: How to Make Your Cell Phone Battery Last Longer when you need it the most:
1. Always try to drain your battery or wait till its 15% or below then charge your phone. Its very important to turn the phone off before you plug it to charge. This help maximizing your battery charge.
2. Stop searching for a signal. When you are in an area with poor or no signal, your phone will constantly look for a better connection, and will use up all your power doing so.
3. Switch off the vibrate function on your phone, and use just the ring tone instead.
4. Turn off your phone's back light.
5. Avoid using unnecessary features. If you know it will be a while before your phone’s next charge, don’t use the camera or connect to the Internet. Flash photography can drain your battery especially quickly.
6. Keep calls short. This is obvious, but how many times have you heard someone on their mobile phone say, "I think my battery’s dying," and then continue their conversation for several minutes? Sometimes, the dying battery is just an excuse to get off the phone (and a good one, at that), but if you really need to conserve the battery, limit your talk time.
7. Turn off Bluetooth. It will drain your battery very quickly.
8. Same goes for WIFI, GPS, and infrared capabilities, if your phone has these features built in. Keep them off; save more power.
9. Use GSM - Using your phone in 3G / Dual Mode will drain the battery quicker than if you just use GSM mode - have a look at your phones spec and you'll see it will quote two different battery life times - normally 50% more for pure GSM use.
Very Important:
Anyone purchase a new phone. Its best DO NOT USE the phone with the little remaining power the battery has. It is best that you put the battery in the phone and turn off the phone and change for minimum of 5-6 hours.
The 1st charge for the battery is very important for lithium ion battery. Leaving the phone off will give the full maximize charge the battery can take. Normal when phone shows charge complete by integrator light or on the screen means its 95% complete. To complete the 100% charge you need additional 1-2 hours after the full charge integrator show. Having the phone off also help keep the charge. A phone that is on and charging will never get that 100% charge because there is alway a little battery being drained just because the phone is one even if its plugged in to a charger.
If you see your battery is not giving the same performance what it use to. You can try this method at least 3-4 times for 1 week and follow up every other month. Meaning turn the phone off and charge it every night. It is best if you can drain the battery to 15% or less before charging the phone.
Click to expand...
Click to collapse
I think you didn't understand a LI-ION battery!!!
1. completely false
2. I've a mobilephone also I wan't to use it!!!
3. Maybe... Have you tested it with a ampere meter?
4. A black display is always a good idea!
5. Why not buying a Nokia 3210 ?
6. Better: Don't use it for call.
7. Correct! (If you don't use a headset)
8. See Pt. 5
9. See Pt. 5
A few facts:
- a new lithium-ion pack does not need cycling through charging and discharging
- Limit the time at which the battery stays at 4.20/cell. Prolonged high voltage promotes corrosion, especially at elevated temperatures.
- 3.92V/cell is the best upper voltage threshold for cobalt-based lithium-ion
- The 1st charge is no different to the 5th or the 50th charge. Stickers instructing to charge the battery for 8 hours or more for the first time may be a leftover from the nickel battery days.
Whole article on: batteryuniversity.com/partone-12.htm (by Cadex Electronic Inc.)

jahmann82 said:
I think you didn't understand a LI-ION battery!!!
1. completely false
2. I've a mobilephone also I wan't to use it!!!
3. Maybe... Have you tested it with a ampere meter?
4. A black display is always a good idea!
5. Why not buying a Nokia 3210 ?
6. Better: Don't use it for call.
7. Correct! (If you don't use a headset)
8. See Pt. 5
9. See Pt. 5
A few facts:
- a new lithium-ion pack does not need cycling through charging and discharging
- Limit the time at which the battery stays at 4.20/cell. Prolonged high voltage promotes corrosion, especially at elevated temperatures.
- 3.92V/cell is the best upper voltage threshold for cobalt-based lithium-ion
- The 1st charge is no different to the 5th or the 50th charge. Stickers instructing to charge the battery for 8 hours or more for the first time may be a leftover from the nickel battery days.
Whole article on: batteryuniversity.com/partone-12.htm (by Cadex Electronic Inc.)
Click to expand...
Click to collapse
I second this as well. The tips given by nuc70st is only applicable in the old days with nickel based batteries (Ni-cd and Ni-MH), which for the past 5 years mobile phones have in general stopped using and have shifted to lithium varieties. Nickel Cadium and a smaller extent Nickel Metal Hydride suffer from "memory effect" so it was important to deep cycle the batteries to maintain its capacity.
Lithium batteries in contrast should be treated in the opposite. You should keep it charged up whenever possible, and fast discharging (draining its charge as fast as possible) actually does more harm than good. Most mobile phones don't discharge it fast enough for it to be problem, but plugging a lithium battery in a purpose made discharger is still a no-no.

I dont know if anybody else can try this with their N1 but I have recently noticed that when my battery does its initial.. drop to 95% before you can wonder what happened, I can charge it with the phone on and the green light stays on, implying that the phone is fully charged.
Then I turn the phone off and charge it, and the red light quickly comes on and allows another hour? of charging before the green light will re-appear.
I think i'll be trying leaving my phone on and on charge overnight and then turning it off while I get ready in the morning and don't necessarily need it.

The green light comes on before the battery is fully charged

AndyCr15 said:
So one person says don't let it drop down low very often, the next person says let it drop to 15% all the time...
Personally I've heard not to let it drop low more often these days. The old 'let it decharge regularly' was talked about a lot 4 or 5 years ago... no?
Click to expand...
Click to collapse
I'm right and the other guy is dead wrong. Deep cycling was better for nickel metal hydride batteries, because it helped delay the memory effect.
No such issue for Li-ion batteries, plus charging makes Li-ion batteries HOT, which isn't particularly good for the battery. So numerous charges leads to less exposure to prolonged heating.

mikesm1234 said:
all very good tips
Click to expand...
Click to collapse
Oh dear. Have you read this thread?
No, they are not good tips...

Rusty! said:
The green light comes on before the battery is fully charged
Click to expand...
Click to collapse
I noticed that just last night! Are you supposed to keep charging it until its 100% or stop it from charging when the green light turns on?
Cheers,
M

[Q] How to preserve the battery life in a location with very poor signal

First to clarify my question: I'm not asking how to prevent the daily battery drain in a poor-signal area. It definitely happens unless the phone is switched to airplane mode. My question is how to avoid the shortening of the battery life in the long run if the phone has to be used in such condition.
My workplace is basically a signal black hole to any carrier. With T-mobile I got no service for most of the time but I can occasionally send/receive text messages/emails say every 15 minutes with flimsy connection. There is absolute no way to make a phone call, so I usually walk outside when needed. I don't have WiFi neither so I prefer to keep the phone on to stay on the grid. However my concern is doing so will shorten the battery life eventually due to the constant power draining and recharging, so I come up with some ways for such condition. Please suggest which you think will do the least harm to battery and allow me to receive email and text.
1. Use it normally. It usually consumes 60% of the battery just sitting on my desk throughout the day. I can actually live with it be cause the battery is large enough for me to waste this way. But it harms the battery life without a doubt.
2. Use it with a charger plugged on my desk for most of the time, so it will supply the power for signal searching. Usually if you keep a battery at full charge all the time, it dies soon due to "slacking." My laptop has this problem and its battery basically serves as a UPS now. I have less concern for a phone because it will still be recharged daily.
3. Use an NFC tag to tell the phone it's in the office, and then use some software to prevent the draining like Tasker/Juice Defender. That makes most sense but I haven't have figure out the profiles. I've used Tasker before (thought it's too complicated) and NFC is totally new to me. I would like to take some suggestions if you have done something similar.
Thanks!

wawacoffee said:
First to clarify my question: I'm not asking how to prevent the daily battery drain in a poor-signal area. It definitely happens unless the phone is switched to airplane mode. My question is how to avoid the shortening of the battery life in the long run if the phone has to be used in such condition.
My workplace is basically a signal black hole to any carrier. With T-mobile I got no service for most of the time but I can occasionally send/receive text messages/emails say every 15 minutes with flimsy connection. There is absolute no way to make a phone call, so I usually walk outside when needed. I don't have WiFi neither so I prefer to keep the phone on to stay on the grid. However my concern is doing so will shorten the battery life eventually due to the constant power draining and recharging, so I come up with some ways for such condition. Please suggest which you think will do the least harm to battery and allow me to receive email and text.
1. Use it normally. It usually consumes 60% of the battery just sitting on my desk throughout the day. I can actually live with it be cause the battery is large enough for me to waste this way. But it harms the battery life without a doubt.
2. Use it with a charger plugged on my desk for most of the time, so it will supply the power for signal searching. Usually if you keep a battery at full charge all the time, it dies soon due to "slacking." My laptop has this problem and its battery basically serves as a UPS now. I have less concern for a phone because it will still be recharged daily.
3. Use an NFC tag to tell the phone it's in the office, and then use some software to prevent the draining like Tasker/Juice Defender. That makes most sense but I haven't have figure out the profiles. I've used Tasker before (thought it's too complicated) and NFC is totally new to me. I would like to take some suggestions if you have done something similar.
Thanks!
Click to expand...
Click to collapse
Isn't the issue with batteries related to cycles? I'm not sure it matters that you end up with 40% of battery at the end of the day vs 15% when you charge it up. A cycle is a cycle, more or less I think.
If you don't believe the first point, I also don't think that research really shows that leaving a lithium ion battery plugged in "all" the time has major detrimental effects, and even if it did you would still be using the battery for a good deal of the day, at least the time you're not at work right?
I feel like you might be a little too worried about it.

kanetheninja said:
Isn't the issue with batteries related to cycles? I'm not sure it matters that you end up with 40% of battery at the end of the day vs 15% when you charge it up. A cycle is a cycle, more or less I think.
If you don't believe the first point, I also don't think that research really shows that leaving a lithium ion battery plugged in "all" the time has major detrimental effects, and even if it did you would still be using the battery for a good deal of the day, at least the time you're not at work right?
I feel like you might be a little too worried about it.
Click to expand...
Click to collapse
About the charging cycle, I read something here: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries. Basically it shows deep charging cycles has more detrimental effects on the battery capacity. My point was if the battery is cycled deeply everyday, it is under much more stress compared to those working with good signals.
Maybe I worry too much but I feel really bad just to see my phone sitting there wasting a lot of battery.

I have had the same problem with you as my office is underground.
From my experience, it's best to turn off data. You can turn off the radio all together, but I guess you still want to have signal where you can.
This can be automated by Taker (haven't used) or Juice Defender. I don't know if Juice Defender Free can do this (it should), but Juice Defender Ultimate have an option to turn off wifi and data when the screen is off.
Having the charger next to your desk is also a viable option. But rather than plugging it all the time, you should charge when it is needed.
Edit: as discussed elsewhere, you should not try to do full charges (0-100%) as this would not work out well for you at office as well as it it will shorten battery life.
Edit 2: Juice Defender Ultimate
=> Enable Advance profile (Status Tab)
=> Go to Control Tab
=> Enable Mobile Data and Wifi control (first and third option)

wawacoffee said:
About the charging cycle, I read something here: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries. Basically it shows deep charging cycles has more detrimental effects on the battery capacity. Mypoint was if the battery is cycled deeply everyday. it is under much more stress compared to those working with good signals.
Maybe I worry too much but I feel really bad just to see my phone sitting there wasting a lot of battery.
Click to expand...
Click to collapse
Can you try only charging your phone at work? From the options you've listed,leaving it plugged in seems like the best option at work seems like the best option. Assuming you currently only charge your phone once a day, it shouldn't make much difference to switch the charging time to during the work day.This way your peak energy usage will fall on a time when you have unlimited power available and you should have enough battery to go home and come back.

build.prop tweak
There is a build.prop tweak but I can't guarantee that it works.
You can try it out and tell us about it :fingers-crossed:
http://www.s3forums.com/forum/galaxy-s3-hacking-mods/474-list-some-build-prop-tweaks.html
#improve battery under no signal
ro.mot.eri.losalert.delay=1000
The number value is how often to re-connect to the tower. A phone in a poor connection area will
attempt to reconnect all the time, draining the battery. It's in milliseconds so 1000 = 1sec. I wouldn't
exceed 2sec but you already knew you are on your own with this one.

I have the exact problem at work.
My question is if I connect the phone to the charger at work, will the phone runs on the juice from the charger or from the battery? If it runs on the juice from the charger (like laptops), that should have minimum effect to the battery. If it uses the battery and the charger just charges the battery then the battery life will be cut in half (2 charge per day instead of 1 charge per day).

I have terrible signal at work and my Inspire has a small battery. My phone is in power save by lunch. I charge mine during lunch every day and leave it on the charger at night. I generally will not plug it in if I can't charge it all the way up. My original battery is now 18 months old and works as well as it did new. Other Inspire/DHD users have had to replace batteries in less than 12 months, so I don't think my charging cycle variations have harmed it too much.
It only has to last until after the holidays when I can order my N4. Even if I had to try to push it to 2 years, I think I wouldn't worry too much.
Also, by the time it is not under warranty, the batteries will be cheap and will always be easier to change than an iPhone.
Sent using the power of the dark side.

Thanks everyone. Based on the discussion I think I will just use it normally and charge whenever needed. The phone should be my slave not the other way around. I'm not planning to root it, at least not now, so I won't change the build.prop.
I did tried Juice Defender yesterday. It slowed down the battery drain but not very impressively, because it only turns off the data not the entire cellular radio. I installed the app during lunch so you can see the difference from the middle of the day. Google+ was a real ***** because it tried to upload my camera photos with such connection... I turned it off too so it also helped.

"Android OS" should not be this active.
It's possible that you have some background process draining the battery. Try disabling as many services as you can.
If you have Wifi at work try turning it ON. If not then turn your Mobile Data OFF like KyraOfFire suggested.

I get weak signal at my work as well. Thankfully, we have WiFi, so I usually force my phone to use 2g then connect to WiFi. :good:

-Mindroid- said:
"Android OS" should not be this active.
It's possible that you have some background process draining the battery. Try disabling as many services as you can.
If you have Wifi at work try turning it ON. If not then turn your Mobile Data OFF like KyraOfFire suggested.
Click to expand...
Click to collapse
I don't have Wifi unfortunately. I will look into Android OS later on.

i9505 battery lasts so little

Hello guys
I have my galaxy s4 i9505 android 4.4.2 . Is that normal, that my phones battery discharges in 2 h 30 min average (from 100%), when i play heavy games like asphalt 8 from fully charged battery till its discharge with wifi on and on 50 % brightness? Also when im surf the net, stay on fb and do stuff like that, my phones battery discharges in 4 hours. I say thats not normal. And by the now my phones battery discharges 1% in 2-1min
So its that a foulty battery problem, charging port problem or else? Dont tell me reset my phone cus, i done that 10 times already and it didint help
Im pretty sure its not Running apps problem either, cus my phone dont heat.

ZenMax said:
Hello guys
I have my galaxy s4 i9505 android 4.4.2 . Is that normal, that my phones battery discharges in 2 h 30 min average (from 100%), when i play heavy games like asphalt 8 from fully charged battery till its discharge with wifi on and on 50 % brightness? Also when im surf the net, stay on fb and do stuff like that, my phones battery discharges in 4 hours. I say thats not normal. And by the now my phones battery discharges 1% in 2-1min
So its that a foulty battery problem, charging port problem or else? Dont tell me reset my phone cus, i done that 10 times already and it didint help
Im pretty sure its not Running apps problem either, cus my phone dont heat.
Click to expand...
Click to collapse
Let's be organized:
1. Faulty charging port: can be, if you phone charges too long. nothing related with discharge speed
2. Faulty battery: check battery SN, if it starts with BD letters, can be. In this case, the battery would be visually swollen, and your phone shall randomly reset with charge from 80 to 30%, and shall not be able to start without the charger connected.
3. Discharge of 60% per hour is possible, depends from the apps running in background. Install Battery Monitor Widget or something similar to investigate closer.

spamtrash said:
Let's be organized:
1. Faulty charging port: can be, if you phone charges too long. nothing related with discharge speed
2. Faulty battery: check battery SN, if it starts with BD letters, can be. In this case, the battery would be visually swollen, and your phone shall randomly reset with charge from 80 to 30%, and shall not be able to start without the charger connected.
3. Discharge of 60% per hour is possible, depends from the apps running in background. Install Battery Monitor Widget or something similar to investigate closer.
Click to expand...
Click to collapse
Thanks for reply I forgot to mention that my charging port is weird, sometimes charges phone, sometimes not. Recently my phone charges only when its turned of completely, when phone is on with charger connected its discharges. Also i can say that thats not a charger problem, because my brothers S3 charges very well with it. I'm i have ordered the new charging cable/part for my phone, and hopping to fix charging issues.
Another problem is that my phone in powering On process goes to Download mode without key combination and dont boot up (sometimes), also in the same way rondomly when i press power on button it goes to recovery mode (without key combination). Is that problem may be realated to this one i stated before (about charging).

It's perfectly normal. There is nothing wrong with your phone.

Lennyz1988 said:
It's perfectly normal. There is nothing wrong with your phone.
Click to expand...
Click to collapse
Really? 2.5h is good on gaiming and wi-fi with 50% brightness? When browsing the net, my phone discharges in rate like 1%/3mins... (average)

it depends entirely on usage. 2.5 hours screen time while gaming is pretty good I think. on stock rom i can manage anything between 1.5 and 4 hours screen time, but it also depends on usage during screen time. if you're running something that's quite hard work on the cpu/gpu and with the srceen constantly on....like gaming.....then obviously that will drain your battery faster than just browsing the web or texting etc.
generally speaking s4 will last through a days normal use quite easily.....but then it depends on how you define normal days use.

Gloris said:
it depends entirely on usage. 2.5 hours screen time while gaming is pretty good I think. on stock rom i can manage anything between 1.5 and 4 hours screen time, but it also depends on usage during screen time. if you're running something that's quite hard work on the cpu/gpu and with the srceen constantly on....like gaming.....then obviously that will drain your battery faster than just browsing the web or texting etc.
generally speaking s4 will last through a days normal use quite easily.....but then it depends on how you define normal days use.
Click to expand...
Click to collapse
Thanks for reply So its nothing to worry about? I had S3 and it lasted much longer than my current S4. Of course i need to look at its 5'' display and 1080p resolution If you guys getting same battery life while heavily using your phones, it means it's ok and i don't have consider of changing battery ?

yeah i think from the sounds of your usage, that's about right for a stock rom.
if you are still only getting about 2-4 hours total use (i.e. battery dead from 100% down to 0%) from your normal daily use while you're at work/school or whatever (i.e. where it's sat idle for most of the day), then you've probably got something wrong. but given that you said you were playing games etc contantly and still got 2.5 hours screen time, that's ok i think.
you can always try and squeeze some more out using custom kernels etc, but if you are not certain it's some other fault i#d try and see what battery life you get on idle first so that you don't lose warranty by flashing a custom system. so yeah try for a day or two leaving it with just normal usage or idle whenever possible to compare

ZenMax said:
Another problem is that my phone in powering On process goes to Download mode without key combination and dont boot up (sometimes), also in the same way rondomly when i press power on button it goes to recovery mode (without key combination). Is that problem may be realated to this one i stated before (about charging).
Click to expand...
Click to collapse
THAT is NOT normal... and yes, it may be somehow related... if your phone shows that often, and if it is under warranty, I'd consider going to service center

ooops, yeah i totally missed the post about your download mode issue and faulty charging port. if you're in warranty, take it back.

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