Guy's how to get static battery backup?? sudden fals
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i am having a quite unusual problem with the battery on my TP. it is hard to explain but i will try my best to do so. While i was casually surfing the web while on the charger i noticed that my battery started to drain ( this is the more ordinary problem that has been posted on many threads ) but this new situation is. The indicator lights and meters within the TP indicate that the battery is charging yet it still drains. I tried turning it completely off and removing the battery and then putting it back in and charge the unit for one hour. After one hour it charged to 20% which is reasonable enough for normal use, so i turn it back on and continue to use the device again the TP still indicates that the battery is charging after listening to about 7 songs i get a very low battery indicator warning (at the same time the battery indicates its charging) there is NO overheating and when the battery reaches 0% it does not die the screen just goes off and i can turn it back on and still recieve the low battery warning but what i cannot do is use data or even turn the phone radio back on. I am on the NFS 1.05 ROM, any suggestions?
eric12341 said:
i am having a quite unusual problem with the battery on my TP. it is hard to explain but i will try my best to do so. While i was casually surfing the web while on the charger i noticed that my battery started to drain ( this is the more ordinary problem that has been posted on many threads ) but this new situation is. The indicator lights and meters within the TP indicate that the battery is charging yet it still drains. I tried turning it completely off and removing the battery and then putting it back in and charge the unit for one hour. After one hour it charged to 20% which is reasonable enough for normal use, so i turn it back on and continue to use the device again the TP still indicates that the battery is charging after listening to about 7 songs i get a very low battery indicator warning (at the same time the battery indicates its charging) there is NO overheating and when the battery reaches 0% it does not die the screen just goes off and i can turn it back on and still recieve the low battery warning but what i cannot do is use data or even turn the phone radio back on. I am on the NFS 1.05 ROM, any suggestions?
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Try to get a charger with an output of at least 1 A. It could be that your charger is not powerful enough to compensate for the drainage. The other thing is that WM' battery indicator flat out sucks... it is like Windows file system when it is desperately trying to tell you how much time you have left before your task is done (2 minutes jumping to 15 seconds jumping to 54 minutes jumping to 2 seconds jumping to 3 days, etc)..
Flash to another rom and see if the behavior still remains.... I doubt NFS messed up that badly with power settings, but it is always worth giving it a shot.
yea i doubt its the rom either as i was having overheating/drainage problems on stock but it wasnt anything like this
my batter meter shows decline in battery level according to my use but it shows slight rise "without connecting it to charger nor to PC " , i ran service test for battery and it revealed that the battery is good and no need to change it
i tried to drain battery to zero until phone turns off and charging it while it is off to 100 for about 4 times but the same issue is there
here are some screen shots with arrows pointing to rising levels to in the attached files
tranzor said:
my batter meter shows decline in battery level according to my use but it shows slight rise "without connecting it to charger nor to PC " , i ran service test for battery and it revealed that the battery is good and no need to change it
i tried to drain battery to zero until phone turns off and charging it while it is off to 100 for about 4 times but the same issue is there
here are some screen shots with arrows pointing to rising levels to in the attached files
Click to expand...
Click to collapse
Dont worry about it bro... dats normal with android.. Sometimes wen i rebbot the phone i loose arnd 3-4% battery but wen i leave it.. it goes up by 1-2%..
Its just a property of modern day li-poly batteries..
By my experience i can tell you in past 2 years i have used arnd 6-8 android phones.. its same with all..
Samsung battery graphs bein poooorest..
Is it related to frequent transient connection to PC and charging it for a while when i trqnsfer data from/to PC
Battery usage is just an estimation based on current usage rather than a read-out of actual events. The jump comes when the estimation was too prudent when compared to the new current usage of the phone. It assumed you would have that much left but because you stopped the heavy activity (or the activity got even lighter) it realizes it has more left so it jumps up. It's perfectly normal and no erratic at all.
How would you explain this?
I didn't charge it...
No clue on that one...never seen anything like that, whereas the TC's mirrors my own battery history which is why I know it's that.
Hello XDA,
I have a weird Problem with my Oneplus X and maybe you can help me... When my phone shuts down I am still able to turn it on 3 or 4 times, first with direct boot and the last ones with app optimization until I see the red battery symbol and the phone wants me to charge for a while... Is this a normal behavior or is something wrong? Can I maybe recalibrate my phone to completely discharge the first time?
Thank you for your help!
Do not discharge battery completely! It's really bad for your battery, significantly shortens it's lifespan and reduces it's maximum effective capacity.
Your phone turns off on low battery to prevent that.
Okay thank you, I've always thought the phone stops me from turning on when the battery is too low, but I will remeber that!
Hi there
I own a galaxy s3 i9300 rooted
My phone was charging over my laptop which was also charging and when i connected a speaker (which also was charging) to my phone electricity has been cut of the house.
Since that time my Battery is draining so fast and phone is turning off on its own.
The headphone jack still working but on low volume and lot of noise.
Just wanted to know what went wrong? And which part of the phone is responsible.
(sorry for my bad English ?)
Thanks
I have a N8000 tablet and need to expand the runtime of the battery.
The battery has 5 pins (two red, two black and one blue cable from the battery). The other battery I bought is also a 3.7V battery (powerbank).
My idea was to attach another battery in parallel with the internal (no power outlet at the location available).
I was expecting that the tablet will run but the internal battery has now 1 percent and when i attach the powerbank battery it still turns off.
What am i not seeing / why is it not working?
Edit: When I unplug the internal battery and directly attach the battery from the powerbank the tablets boots up fine.
Edit2: Forgot the most obious. Why am I not charging the tab with a powerbank via USB? The USB port is in use (OTG) the whole runtime on the tablet.
SOLVED!
For documentation:
In the meantime I've switched to a Galaxy Tab 3 but this should work for all androids.
Battery has 6 pins
Two red, two blue, two black.
Ive removed the battery and put some cabling to the outside red and black and connected it to a power-supply.
-> Tab wont turn on.
Then i found a couple threads that mentions that there should be a resistor between the ground (black) cable and the blue. These blue lines are NOT the same. So I pulled one cable out of the plug and reattached the battery to see if the tablet switches on. It didn't. Then i plugged the blue cabled back in and removed the other one - reattached ... the tabled switches on!
So now i know which of the blue wires is important. Ive charged the battery completely and measured the resistance between the blue line and ground -> 100kOhm.
Resoldered my cables and installed a resistor to ground. Tablet starts with external power supply .. 64 % battery ... and going down slowly!
After it reached 1% it switches off!
After A LOT research and days Ive found an explanation here:
https://android.googlesource.com/pl...s/java/com/android/server/BatteryService.java
Code:
private void shutdownIfNoPowerLocked() {
// shut down gracefully if our battery is critically low and we are not powered.
// wait until the system has booted before attempting to display the shutdown dialog.
if (mBatteryProps.batteryLevel == 0 && !isPoweredLocked(BatteryManager.BATTERY_PLUGGED_ANY)) {
mHandler.post(new Runnable() {
@Override
public void run() {
if (ActivityManagerNative.isSystemReady()) {
Intent intent = new Intent(Intent.ACTION_REQUEST_SHUTDOWN);
intent.putExtra(Intent.EXTRA_KEY_CONFIRM, false);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivityAsUser(intent, UserHandle.CURRENT);
}
There it is. If battery is 0 and no power-supply is attached then android is shutting down itself - even if the voltage is up.
Honestly I havent understand how the capacity is determined - voltage was always good.
Anyway after a couple more days just before giving up i've had the idea of instead finding the reason why the battery is going down to simply fake it.
Ive found a stackoverflow post (sadly cannot find it anymore) which basically said you can set the battery to any percentage you want with this command (root):
Code:
dumpsys battery set level 99
There you go. Your tablet runs with an external power supply.
Hope this saves someone a lot headache.