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Instantaneous battery % drop - from 80% to 10%

This is one thing thing that just recently started to happen in the past two days that's kinda creeping me out.
Sometimes the phone starts to overheat and immediately I get a low battery notification.
The overheating is usually caused by something that caused the system to go haywire, such as:
(1) when in the stock launcher and using HDMI mirroring, tilting the phone into landscape. The phone loses the connection with the monitor, and it shuts off. Once this happens the phone is usually super hot. I turn the phone back on, and find out that the battery has dropped somewhere around 50-60% in an INSTANT.
(2) I was using bloat freezer to freeze "my account," which caused a continuous force close screen. When I try to close those screens, I can tell that the phone is heating up again. Low and behold, not soon after, my charge that was sitting at 80% dropped down to the teens.
I've only been off the charger for a couple hours in each case, so I know that I was really at around 80% in both situations.
The only thing I'm really worried about is overcharging the battery. If android thinks that the battery is at 15% when it is actually not that empty, would it overcharge it?
*Edit - Ok, I just figured it out. Whenever this happens, don't let your phone recharge itself when the phone is on. I noticed that when I turn my phone off to charge, it'll know that the charge isn't that low, so the battery charging indicator will start off with a higher charged capacity and fill up to full much faster than when the phone is actually empty.
As for the plunge in battery within Android, I don't know what's going on.

Request a new battery. If they say no say fine give me a new phone. Its in warranty.
Sent from my LG-P999 using XDA Premium App

Battery question. Dieing when powered off

Ok I have searched and not found anything like this yet so I am going to ask. I know the phone has battery problems all around for a lot of people. Mine seems to be fine when it is on. It can sit and idle powered on all day locked and stay at full charge. It runs about 10 hours with minimal use and maybe 8 hours with some data use and a few calls and texts. Now I am experiencing a wired problem. When I go to work we cannot have cell phones. I leave my phone in my locker and power it off. After my 12 hour shift is up at work I come back to the phone with a dead battery? What could be causing this? And has anyone else noticed this issue?

defective battery? pull the battery and see if it still does it. If it does, gotta be a defective battery.. if it doesn't do it when pulled, you're not shutting off the phone maybe?

Yesterday I tried leaving the battery out. I took the battery out and let it sit 12 hours and it still had full charge when I put it back in. When I go to work I long press on the power/lock button and choose Power off then I watch it shut down and it just dies before I come back. I wish I could watch it the whole time. Today I left the phone off for around 6 hours and came back and it was fine though. Maybe it gets turned on some how at work. I have no idea. Or when I go to power it on it is just the issue where the phone isn't reading battery % correctly and it just says 0%

Seems like a battery driver issue or a defective battery? definitely call t-mobile and check if it's the battery. I've had some issues as well, but not that bad.

Weird.
So the phone powers off after you turn the screen on and it won't come back on? Try putting the phone in airplane mode.
Also, I'm assuming you are running the stock roms?
Might also want to check into a battery monitor to see if any 1 thing is pulling it down.
I think it might just be the battery driver. Sounds like the phone is in suspend so it doesn't power off properly until the screen is turned on and is revived, updating the battery % status, seeing 0%, and turning off.
CM7 fixed the wonky battery issue a few nights ago. Right now, I think a current CM based rom is the best bet as it has most of the drivers fixed. I'ved used mine pretty heavily today, unplugged at 8am and I just got a 15% battery warning at 11:30pm. It will usually last until I go to bed at midnight but I might want to play with it some more.

[Q] Htc sensation battery and charging problems

Hi all i recently bought a htc sensationand it was on a custom rom cm10 its rooted and all that good stuff but now theres just one problem! the phone takes forever to charge!or if i reboot it it will say charged. also when im out and about and listening to music or whatever the phone drains the battery so fast. all i want to know if its a problem with the phone itself or can i fix this myself
mostly i want to fix the battery draining so quickly.HELP PLEASE!

I think the issue is with your battery..
Your battery need to be replaced..
Beamed from my beloved HTC Sensation using xda premium

ruefrancis said:
Hi all i recently bought a htc sensationand it was on a custom rom cm10 its rooted and all that good stuff but now theres just one problem! the phone takes forever to charge!or if i reboot it it will say charged. also when im out and about and listening to music or whatever the phone drains the battery so fast. all i want to know if its a problem with the phone itself or can i fix this myself
mostly i want to fix the battery draining so quickly.HELP PLEASE!
Click to expand...
Click to collapse
First off, I agree with Anumunir. Replace the battery. It's a used phone. The slow charging is an indicator that the battery is old and worn out. Good batteries are cheap (Search for Anker on Amazon or eBay and that's what you want)
However, the issue with the phone jumping to 100% is adding to your problems. That's kind of normal....but it can be minimized. The problem this creates is that the phone thinks it's at 100% so it shuts off the power circuit to the battery so it stops charging. But it's not at 100%. It's at like 70%. So after you unplug, it quickly starts dropping to what the actual charge is. So it looks like it's draining fast.
Here's how you minimize this...
Frist, get the new battery..because why not?
Second, drain the battery until the phone shuts off. Restart it, plug it in, and let it charge all the way. Don't reboot. Don't mess with it. Just let it charge. When it gets to 100%, keep letting it charge more for another hour.
Third, use the phone until it drains all the way down and shuts off again. Play videos or a graphically intensve game if you need to in order to burn the battery down. Don't reboot it until you use up the battery.
Fourt, plug it in and recharge it all the way back up again. Now it should be smoothed out a bit so you don't get those big battery jumps on reboot.
Don't bother with 'battery calibration' apps or wiping battery stats that someone will repond to you thread with. They don't do anything. It's an urban myth.

Skipjacks said:
First off, I agree with Anumunir. Replace the battery. It's a used phone. The slow charging is an indicator that the battery is old and worn out. Good batteries are cheap (Search for Anker on Amazon or eBay and that's what you want)
However, the issue with the phone jumping to 100% is adding to your problems. That's kind of normal....but it can be minimized. The problem this creates is that the phone thinks it's at 100% so it shuts off the power circuit to the battery so it stops charging. But it's not at 100%. It's at like 70%. So after you unplug, it quickly starts dropping to what the actual charge is. So it looks like it's draining fast.
Here's how you minimize this...
Frist, get the new battery..because why not?
Second, drain the battery until the phone shuts off. Restart it, plug it in, and let it charge all the way. Don't reboot. Don't mess with it. Just let it charge. When it gets to 100%, keep letting it charge more for another hour.
Third, use the phone until it drains all the way down and shuts off again. Play videos or a graphically intensve game if you need to in order to burn the battery down. Don't reboot it until you use up the battery.
Fourt, plug it in and recharge it all the way back up again. Now it should be smoothed out a bit so you don't get those big battery jumps on reboot.
Don't bother with 'battery calibration' apps or wiping battery stats that someone will repond to you thread with. They don't do anything. It's an urban myth.
Click to expand...
Click to collapse
Well the original battery is the original so i got one of amazon and it still does that

Still the same?
ruefrancis said:
Well the original battery is the original so i got one of amazon and it still does that
Click to expand...
Click to collapse
Ey mate, I have the same problem. My battery is fully charged after ten hours or more. I cant afford to buy a new one, so, what did you do with yours¿?

[Q] Battery dead or just drained?

Hey folks,
I'm sitting here with a very stylish paperweight. Can't charge it. No LED, not even the blinking red one. Just nothing.
Here is what happened:
My phone started to get pretty hot, so I decided to turn it off, just for safety. It had around 90% battery left at this time. When I turned it back on an hour later, the battery percentage was at about 18-19%. I used the phone as usual. No strange behavior, no sign of malfunction. After using it for quite a bit, the phone shut down as expected. The battery percentage fell in an usual matter. It went off normally.
Now, when I try to charge it, it doesn't seem to show any vital signs.
Here is what I tried:
- charging it for 2 hours with HTC Wallcharger, also tried out 2 other chargers
- Power + VOL UP
- Power + VOL DOWN
- both with a bright light pointed at the sensor
Still nothing. Connecting it to PC won't do anything good atm.
Is the battery dead, or is it just terribly drained? Did I even manage to fry the MB? Is there anything I could do?
Turning it in for warranty repair won't be an option, since it's (you guessed it) rooted and therefore unlocked. I flashed CM11 nightly about a week ago, had Codename Lungo before.
This is quite a bummer. I hope, you good people might be able to help me.
Thanks in advance,
MightyToph

[Q] Restarting constantly .Work Fine in Airplanemode

My LG f100L phone is restarting constantly. It work fine most of the time when battery power more than 60%. but when it come down around 60% it starting restart. It comes to the boot screen and booting again and again. Sometimes this happening when battery full and Data On. If i put my phone in to airplane mode phone work fine until the battery ends. In my country there are no suitable battery for that. so i have to import it from EBAY or something. Before buying a new battery , can you please tell me guys , is this a battery problem ? Thanks.