Yes, I know. We're all sick of these battery threads. But I just came across something I wanted to share with you all.
Before I continue: I don't use any task killers. And I've read every battery trick thread on here and on Android Forums, so I've done it all. The CDMA fix. Rooting and using OCWidget. Charging it to 100%, turning it off, and then cycling the charge with the phone in the off state. And of course, disabling every data hungry app plus setting screen brightness to 50%. This is my 3rd Android phone, so it's definitely not my first rodeo.
So last night I was using my Evo as it was on the charger. I was browsing the web, and checking out some new apps in the market, so the screen was on for quite a while. I took my Evo off the charger, did some heavy texting, some browsing, Facebook, Twitter, etc, etc, and about 5 hours later I was at 80%. I then put it on the charger, and went to bed.
Fast forward to this morning: Took it off the charger, sent a few texts, and I'm down to 95% within minutes. Of course this frustrated me, since last night I went an hour before it even dropped to 99%. It'll be getting some heavy use today, so the last thing I want to do is leave the house with my battery in the 80% range. I put it back on the charger, and resumed normal usage. Some texting, Facebook, Movies app, Netflix app. Eventually the charging light goes green again. Took it off the charger an hour ago, did some texting, stayed connected to WiFi,and I'm still at 100%. Whereas earlier this morning it dropped 5% in minutes under the same use.
Scratched my head for a second, and remembered that my phone was on and in use while charging last time, before I took it off and got great battery life.
So now, I've set it so my Evo's screen stays on while charging. I also use the Power Control widget to increase the screen brightness to 100% while charging. And then once it's off the charger, just drop it to 50%.
To keep the phone awake while charging:
Menu -> Settings -> Applications -> Development -> And then tap the check box next to 'Stay awake'.
Not saying this is guaranteed to work, and I have no rational explanation as to how this works, but it's definitely helping me. I'm going to do some testing and report back on a few things.
I think you might be on to something. I recently had an experience where my batter was around the 60% mark, I plugged it into my computer for about 30mins - 1hr and somehow it managed to charge to 100% battery in that short time span. Needless to say, the battery drained pretty quickly until it reached some stable point. I'll try the charge with screen on thing when I get a chance.
as odd as this sounds, i have notice the same thing when using my phone while on the charger then taking it off. I use screen cast when i'm at work, so my phone is always plugged into the computer. Once i leave work for the day my phone is usually fully charged or about 80% with moderate usage my phone is usually around 60-70% when i lay down to go to bed. Now on the weekened when i charge my phone overnight, the following day with moderate to heavy usage my battery drops to like 50% within a hour to a hour in a half. So i plug it in while texting or browsing, and when it get fully charged the battery seems to take 3-4 hours to get to 50% with moderate to light use. Weird
I've currently enabled every bell and whistle on my Evo so I can speed up the battery drain. I'm making note of the voltage reading at each percentage (via Battery Indicator), and then I'm going to charge it back up with the screen off to compare these numbers.
I think the issue isn't the charging with the screen on. I think there may be a "bug" that, when the phone hits full charge, it doesn't continue to charge but instead starts using the phone battery. Thus, when you charge at night, it's fully charged for a while, you start using it in the morning and it quickly drops to whatever has already been used (~94-95%). But, if you charge it and take it off soon after the light turns green, then it's fully charged and you're getting the full 100%.
I think there's a problem with the trickle charging.
gianmarco00 said:
I think the issue isn't the charging with the screen on. I think there may be a "bug" that, when the phone hits full charge, it doesn't continue to charge but instead starts using the phone battery. Thus, when you charge at night, it's fully charged for a while, you start using it in the morning and it quickly drops to whatever has already been used (~94-95%). But, if you charge it and take it off soon after the light turns green, then it's fully charged and you're getting the full 100%.
I think there's a problem with the trickle charging.
Click to expand...
Click to collapse
My testing confirms this theory. I put mine on the charger after work, and the light was green when I went to bed.. the next morning when I unplugged it, it dropped to 90% within a few minutes. Everytime I've unplugged it right after the green light comes on, it stays on 100% for at least 15-20 minutes of use.
gianmarco00 said:
I think the issue isn't the charging with the screen on. I think there may be a "bug" that, when the phone hits full charge, it doesn't continue to charge but instead starts using the phone battery. Thus, when you charge at night, it's fully charged for a while, you start using it in the morning and it quickly drops to whatever has already been used (~94-95%). But, if you charge it and take it off soon after the light turns green, then it's fully charged and you're getting the full 100%.
I think there's a problem with the trickle charging.
Click to expand...
Click to collapse
That explanation sounds accurate, so instead of doing all this it might b a simple tweak to not have this trinkle effect happen
Sent from my PC36100 using XDA App
It was mentioned in another thread that "trickle charge" gives the battery a better deeper charge. Perhaps a 500 or 700 mah charger will do the trick instead of risking a screen burn.
Hi
Yesterday i install and run this program http://sourceforge.net/projects/netspoof/ for about 30-40 seconds, my phone was showing 60% battery. After 40 sec my phone was burning and i got the red led. Try to boot but nothing. Put the phone to charge and after a few minutes, he start to boot. Let him charge for 30 minutes @ 55%, reboot the phone and after that it was showing 30% charge. Left the phone 40 minutes to charge and it was showing full, reboot and then showing 40% watch him charging, the phone was jumping from 40% to 45% to 52% etc. Some help please.
Rom cm-10.1-20130130-NIGHTLY-mako with Franco kernel r61
Hi all.
I recently bought a first-generation Nexus 7 and am having some problems with charing/discharging/battery consumption. Right now, the problem appears to be that the device charges painfully slowly when the screen is turned on. The device has literally been plugged in to the factory wall charger (12V 2A) for more than 5 hours, and the battery level has increased from 70% (when it started) to 74%. During this time the screen has been turned on, brightness to the lowest setting, airplane mode on, and no apps whatsoever are running in the background.
However, it appears to charge at a normal speed when the screen is turned off.
I have also noticed that when apps are running (not battery intensive apps, either--basic web browser, maps, etc.) while the screen brightness is at 100%, the battery actually discharges when the device is plugged in.
It's rooted and running a cyanogenmod 4.4 ROM.
Any help would be appreciated.
Also, I have been testing with the screen turned on because I'm using this tablet for an application that requires the screen to always be on.
Anyone???
I too have this very same issue.... Just started a few days ago...
I am having issues with my battery. It drops fast from 100 to 75 in 30 mins and them holds well till 30 during which time I can get 2:30hours of screen on time. After that when it gets to 20% the phone suddenly turns off without warning. I tried recall calibrating battery by fully charging,then bump charging it to 100 and then let it fully fall and then turn it on and let it fall. And then fully charged it but still it dies around 20% mark.
What should I do?
Regular charging and fast charging both give the same estimated time left. The phone still displays that it's fast charging but there is no actual speed improvement.
I've wondered about this, too. The manual says that fast charging is disabled when the screen is on, and any time you're looking at the estimated charge time you have the screen on.
I think the only way to test for sure is to discharge the battery to a specific point (say 30%), then charge it with fast charge off and see how long it takes. Then drain it to 30% again, and this time charge with fast charge on (making sure the screen remains off), and time that.