Database Develop

Battery Problem

My phone suddenly just shuts down when I'm using it... not a "powering off" but just out of nowhere turns off
Anyone know what the problem might be?
I've had this same issue before, so I bought a new battery last month and it worked great until just last week...
I've tried resetting the battery stats....nothing....
The battery still fully charges and shows the correct percentage when I plug in the charger to use...
Could it be the ROM or battery issue?
....I'm currently using cannon's rom... 2.2.1
Anyone know how to fix?..... thanks
Sent from my T-Mobile G1 using XDA App

Well if you have a new battery already. And it shows its good. I think it might be the rom then.
sent from my superfroyo dream

me too
i having the same problem but only on CM base froyo roms and most of the times my phones shuts down i using internet...
ANYONE HELP IS REALLY ANNOYING...

Andy7 said:
i having the same problem but only on CM base froyo roms and most of the times my phones shuts down i using internet...
ANYONE HELP IS REALLY ANNOYING...
Click to expand...
Click to collapse
im having the exact problem on htcclays superfast. what the heck is going on. my phones doing it at any given time now. i reboot it then it works fine for a few hours then bam happens again!

@BenDiesel
do you also have the probelm that it doesnt powers on except if it on AC???

drklink said:
My phone suddenly just shuts down when I'm using it... not a "powering off" but just out of nowhere turns off
Anyone know what the problem might be?
I've had this same issue before, so I bought a new battery last month and it worked great until just last week...
I've tried resetting the battery stats....nothing....
The battery still fully charges and shows the correct percentage when I plug in the charger to use...
Could it be the ROM or battery issue?
....I'm currently using cannon's rom... 2.2.1
Anyone know how to fix?..... thanks
Sent from my T-Mobile G1 using XDA App
Click to expand...
Click to collapse
Something to take note, What are you doing when it does this?
-Surfing net on the phone
-Listening to music
-Charging
-Tethering
Keeping in mind that the phone will shut its self down (it should) if your battery starts to over heat. On my Hero the charge light flashes before it shuts down and it gets really hot to the touch. Also at higher heat temps, overall battery life suffers.

my phones shuts down usually when wifi is on and im sirfing or using youtube app or google maps(every time i use wifi for a while this happens...)
it also shuts down rarely on calls and sometimes when im trying to flash a new rom...
it doesnt powers on until i connect it on AC...
I REALLY NEED HELP...
ps:if i change the battery will my problem been solved?

quantumtransfer said:
Something to take note, What are you doing when it does this?
-Surfing net on the phone
-Listening to music
-Charging
-Tethering
Keeping in mind that the phone will shut its self down (it should) if your battery starts to over heat. On my Hero the charge light flashes before it shuts down and it gets really hot to the touch. Also at higher heat temps, overall battery life suffers.
Click to expand...
Click to collapse
it turns off randomly...even when im just browsing through the home screens... a full charge will last me like 5 minutes max.... no matter what im doing an the battery doesnt overheat at all...
and when i plug it in to the charger, it shows the correct percentage.. well at least an estimate of what it could be (for about 5 min of use before shut down= 95%)

I have the same problem, It is extremely frustrating.
The shutdowns would happen randomly during surfing the net or using google maps. It would shut down out of no where and it would be impossible to turn back without being plugged into a charger since the phone thinks it battery is at 0 even it was just charged to full before the shutdown. I tried to calibrate the battery but it would just shut down while I'm trying to burn through the charge with the screen on. This is the such a nuisance, can't even get through one day.
I am using biffmod 1.8 so I don't know if this is a rom related problem.

I'm havuing the exact same problem. Even with a full battery, the pgone will shut down when I do anything more than a text or two here and there. When I put it on the charger I will still have a significant amount of power left. I've tried doing full wipes and changing roms. I think it might actually be related to the radio. This began after I updated the radio. It would get stck on formatting the cache. I tried going back to the old radio, but the problem has persisted.. and it also got stuck on formatting cache...
I hope someone can help with this bc it pretty much renders the phone useless when it's not being charged. =\

try change the battery...this solve my prob

you could try recalibrating the battery.
let your phone die.
plug it in for so long that you are 100% sure that it is full.
boot to recovery wipe battery stats.
boot normal
use it and let it die.
recharge again until its full BEFORE booting it.
if you sure its full boot normal.
if you follow this cycle some times it should be fine.
Only issue: you have to wait long until its full and you always have to be near an ac

i've tried re-callibration.. guess i will have to get another battery..
i don't think it's the battery though bc others with the same problem said that the problem persisted after getting a new battery.. =\ we'll see.. thanks for the replies.

[SOLVED] Incorrect Battery Values

This seems to be quite a common and somewhat obscure at the same time.
Many people have reported installing a new rom or even just powering up their phone and seeing a battery % much different from what they expect. Most often much lower than it should be. Evidently this corrects itself after some time but it's a real problem if your display reads <15% because you really have to plug it in then, even with you know you have 90% battery!
So, here's the solution after testing it under different circumstances over a few days:
Simply boot your phone when it is not plugged in to a power source and battery % will be accurate.​
That simple. Silly LG!
So, if you flash a new rom, unplug the USB cable before you reboot...
Hit 'Thanks' below for the 50 reboots I did to prove this...

hehehe jups allready figured that out on myself tho haha. But indeed that's kinda silly of LG

djmcnz said:
This seems to be quite a common and somewhat obscure at the same time.
Many people have reported installing a new rom or even just powering up their phone and seeing a battery % much different from what they expect. Most often much lower than it should be. Evidently this corrects itself after some time but it's a real problem if your display reads <15% because you really have to plug it in then, even with you know you have 90% battery!
So, here's the solution after testing it under different circumstances over a few days:
Simply boot your phone when it is not plugged in to a power source and battery % will be accurate.​
That simple. Silly LG!
So, if you flash a new rom, unplug the USB cable before you reboot...
Hit 'Thanks' below for the 50 reboots I did to prove this...
Click to expand...
Click to collapse
What about every time I use a custom rom the battery % indicator jumps right down to 90-95% when unplugging from charger ? Do you have a solution for that ?

reidar.ostrem said:
What about every time I use a custom rom the battery % indicator jumps right down to 90-95% when unplugging from charger ? Do you have a solution for that ?
Click to expand...
Click to collapse
Try rebooting after you disconnect power.

djmcnz said:
Try rebooting after you disconnect power.
Click to expand...
Click to collapse
Sorry to say the same..
Even while charging with the phone shut down, pulling it off the charger and then booting this happens. On my phone I have experienced it on all MCR's.
It's really not a big deal as long as the battery performs as Stock 10b, that build has been stable batterywise on my phone. But staying stock isn't too much fun

Well, every time I charge, whether I reboot/shut down before unplugging or not, my charge always maxes out at 96%.
Annoying and I'd like it sorted if at all possible.
Anyone?..........lol
Sent from my LG-P990 using XDA App

ye i got that exact same issue i was wondering why that was happening and hoped that a simple reboot would fix it but its a bit more complicated than that i suppose...
also the battery reset in cwm didnt fix the loading till 97% w/e percentage.
when i install the stock rom it allows me to load it till 100% though pretty weird stuff -.-

mcnob said:
Well, every time I charge, whether I reboot/shut down before unplugging or not, my charge always maxes out at 96%.
Annoying and I'd like it sorted if at all possible.
Anyone?..........lol
Click to expand...
Click to collapse
I had a replacement netbook battery that could only max to 90%. So, over the weekend, I practically drained it to 0% (not a healthy practice for Li-ion batteries but I was desperate). Took out the battery for a while, and then recharged for several hours. Well, it seems to get up to 100% now.
Perhaps you could try using the the phone until it very low on battery before recharging. Maybe the charging process in the phone needs some sort of recalibration. But should not be doing this all the time as it will reduce Li-ion battery longevity.

Let mine totally die last night so it wouldn't even turn on at all. Took out and replaced battery and then charged it overnight and hey-presto, when I unplugged it this morning, it stayed at 100%.
Solved indeed....for me anyway. Feel free to try the same and post your results.
Sent from my LG-P990 using XDA App

mcnob said:
Let mine totally die last night so it wouldn't even turn on at all. Took out and replaced battery and then charged it overnight and hey-presto, when I unplugged it this morning, it stayed at 100%.
Solved indeed....for me anyway. Feel free to try the same and post your results.
Sent from my LG-P990 using XDA App
Click to expand...
Click to collapse
I'll be sure to try your tip man. But not easy drain it completely when I always need the phone :=)

I guys! I've got the same problem.
I think that it could depend on the "full battery popup FIX" that Paul introduced in his roms by the FR8.
So I would like to ask Paul if you can create a patch to remove that fix. Just to try it!
According to me, incorrect battery amount depend on a wrong voltage read error (offset introduced?) by the rom. :blink:
In my case, I have followed many times battery wype procedure without positive issue. The matter leaves only by flashing original roms.
I think that if Paul have written a wrong battery values range (to delete the battery full popup) that can be traduced in an incorrect battery status displays.

manciu said:
I guys! I've got the same problem.
I think that it could depend on the "full battery popup FIX" that Paul introduced in his roms by the FR8.
So I would like to ask Paul if you can create a patch to remove that fix. Just to try it!
According to me, incorrect battery amount depend on a wrong voltage read error (offset introduced?) by the rom. :blink:
In my case, I have followed many times battery wype procedure without positive issue. The matter leaves only by flashing original roms.
I think that if Paul have written a wrong battery values range (to delete the battery full popup) that can be traduced in an incorrect battery status displays.
Click to expand...
Click to collapse
It was occurring before Paul introduced that change unfortunately...

After I wrote here, I registered a premium account to Paul's from modaco site and toke a custom fr12 rom without "battery full popup remove patch". Now I'm going to sleep and plugin the 2x to charge. Tomorrow I'll write here if is that the solution...
djmcnz said:
It was occurring before Paul introduced that change unfortunately...
Click to expand...
Click to collapse
I'm sure it's occured from fr8 in my case. With stock rom I haven't any battery problem so there is something wrong in fr raleases of course... I hope somebody discovers what is...

manciu said:
After I wrote here, I registered a premium account to Paul's from modaco site and toke a custom fr12 rom without "battery full popup remove patch". Now I'm going to sleep and plugin the 2x to charge. Tomorrow I'll write here if is that the solution...
I'm sure it's occured from fr8 in my case. With stock rom I haven't any battery problem so there is something wrong in fr raleases of course... I hope somebody discovers what is...
Click to expand...
Click to collapse
Perhaps, but you can not conclude it was introduced by MCR. You logic is wrong there.

Even without "battery full popup fix" it doesn't work good...
Battery level, when unpluged, stay at 100% for 2 minutes afterwards drop down fast until 85% then drain normally...

I'm getting huge battery display problems no matter what I do.
When I took it off the charger this morning, it said I had 100%... thats fair enough. However it stayed at 100% all day, so to "refresh" it this evening I restarted the phone, and low and behold it now says I have 27% left. But again, it's just sticking at that value, even with me now plugging the phone into the wall to charge. It simply says "Charging (27%)" and won't budge, likely until I restart the phone again.
Sometimes it works fine, it seemed to be doing ok last night before I put it on the charger. Any tips/suggestions? Is this something likely to be fixed when the Gingerbread update rolls around?
This is my first real smartphone, and am fairly annoyed as its giving me a fair few problems that I've not had from other electronic devices.

As I stated in another thread, I had the same issue while on MoDaCo Fr12. However, after reverting back to stock, the battery percentage is spot-on and I'm getting up to 48 hours use out of it.
Draw your own conclusions.
Sent from my LG-P990 using XDA App

That sounds super, but I'm still on stock too. About the only things of note I've done are root and switching to Launcher Pro. Oh, and Clockwork Mod of course. Perhaps a complete reboot is needed, we'll see how it goes.
Saying that - since charging, my phone has been at 90% all evening, until right this moment when it changed to 89%. It's less than I'd expect on this type of phone for 3-4 hours use (or lack thereof, I've barely touched it), but it's a start eh?

Welcome to the world of smartphones my friend. I've had various handsets over the last 4 years from iphone to android and a day and a half out of the battery is about average......at best. ;-)
Sent from my LG-P990 using XDA App

Just to clarify, what I meant in my previous post was that I was expecting to battery to drop a lot more than it did. The fact that it only went down 1% in several hours of use prompted me to think that the battery value was messed up.
As it is, I've not charged my phone in the 36 hours since, and it tells me I have 73% battery left. Perhaps it is performing extremely well after all? If that's the case then I'm more than happy with it, but being the pessimist I'm still expecting the phone to turn off sometime with the battery reporting incorrect values.

Battery going down while charging...

so this issue has been happening for about a week now. i didnt flash or do anything with my phone during this period of time. it just randomly started happening.
the issue : for example. my battery is at 20%. if i start charging my phone, the battery goes up to 98%, however the battery starts dropping(while charging) until it hits 87% and stays at 87 the whole time.
I've been noticing that it always goes up until 98. and also it always drops til 87.
any fixs for this issue?

Old batter? Did you try recalibrating it?

What kernel do u use?

recalibrating didnt help.
and im currently using the talon kernal.
Sent from my Galaxy S captivate

Well talon is known for that, it has the accurate battery mod .Calibrating ur battery might help, if not the latest talon 0.5.2.4 has the battery drivers of i896 and it seems like it's back to what it was in the past --> charges the battery 'till 100% and stays there, but upon disconnecting the cable it will drop to xx% (good old gb charging bug)

Go back to Talon 0.5.2.3

mrhaley30705 said:
Go back to Talon 0.5.2.3
Click to expand...
Click to collapse
hey that helped solve the issue.
at least for now the issue is gone so thanks guys!
Sent from my Galaxy S captivate

Battery virtually dropping, hardware or software problem?

Hello,
for months it has been happening that when the battery usually reaches 25% (but not always sometimes even 40ish) the battery indicator drops to 19% and it could either remain stuck at that value until the charge actually drops below 19% and continue the usual drop or it will rapidly drop to lower values in big steps like (19->10->4) in minutes to finally actually automatically power off. The strange thing is that it's all fake! When I power the phone again the % will go back to where it should be before this virtual drop happened and continue its usual drop, it always worked until today when for the first time it continued the "game" non-stop until the battery ended the actual charge (for hours)! You have to consider that i was in a place in the mountains where the gsm coverage was very low/non existent so it could be connected. But it got me worried because it couldn't control it!
Apart from a solution I'm asking also what the reason could be. It could seem like a battery problem but why would the phone actually recognize the actual charge after it powers off and I restart it ? Seems like a software problem (battery driver maybe?). But I wouldn't exclude that it could be the battery maybe when the charge gets low the voltage drops dramatically under stress to a point where the phone thinks its almost empty.
I'm using cm7.2 kang 119 with standard kernel.

Have you tried wiping the battery stats..?
Sent from my Optimus 2X using xda premium

-sandro- said:
Hello,
for months it has been happening that when the battery usually reaches 25% (but not always sometimes even 40ish) the battery indicator drops to 19% and it could either remain stuck at that value until the charge actually drops below 19% and continue the usual drop or it will rapidly drop to lower values in big steps like (19->10->4) in minutes to finally actually automatically power off. The strange thing is that it's all fake! When I power the phone again the % will go back to where it should be before this virtual drop happened and continue its usual drop, it always worked until today when for the first time it continued the "game" non-stop until the battery ended the actual charge (for hours)! You have to consider that i was in a place in the mountains where the gsm coverage was very low/non existent so it could be connected. But it got me worried because it couldn't control it!
Apart from a solution I'm asking also what the reason could be. It could seem like a battery problem but why would the phone actually recognize the actual charge after it powers off and I restart it ? Seems like a software problem (battery driver maybe?). But I wouldn't exclude that it could be the battery maybe when the charge gets low the voltage drops dramatically under stress to a point where the phone thinks its almost empty.
I'm using cm7.2 kang 119 with standard kernel.
Click to expand...
Click to collapse
So you say it's done that for a while... obviously it's not possible to pinpoint an app. I guess then you have some funky cruft buildup (say, a lot of rom flashes and some settings getting squiffy) or your battery's dying. I know for sure that the rather excellent Battery Widget Reborn can give a health check on the battery as part of the widget (although I dunno if it's GB compatible). The second solution may be to try a clean wipe. It's drastic, yes, but can clean up any lingering problems if you've been updating for a long time without the occasional wipe. If you haven't...then I dunno.
xExabyte said:
Have you tried wiping the battery stats..?
Sent from my Optimus 2X using xda premium
Click to expand...
Click to collapse
Baaaaaad advice. That's just a placebo and doesn't do anything. So please don't recommend it.

Dekudan said:
Baaaaaad advice. That's just a placebo and doesn't do anything. So please don't recommend it.
Click to expand...
Click to collapse
What do you mean by this? Don't be rude, just help out if you can.
OP: is it possible you update the rom/kernel?
Sent from O2X via xda premium, beware of autocorrection

The thing is it doesn't happen at every single charge! That's confusing! Maybe I'll try to update to #135 and install symbiosis kernel and see.

coolacrille said:
What do you mean by this? Don't be rude, just help out if you can.
OP: is it possible you update the rom/kernel?
Sent from O2X via xda premium, beware of autocorrection
Click to expand...
Click to collapse
I'm not trying to be rude. It's just that battery stats are reset after every reboot, so wiping them does nothing. It's also easier to be blunt to get a message across.

-sandro- said:
Hello,
for months it has been happening that when the battery usually reaches 25% (but not always sometimes even 40ish) the battery indicator drops to 19% and it could either remain stuck at that value until the charge actually drops below 19% and continue the usual drop or it will rapidly drop to lower values in big steps like (19->10->4) in minutes to finally actually automatically power off. The strange thing is that it's all fake! When I power the phone again the % will go back to where it should be before this virtual drop happened and continue its usual drop, it always worked until today when for the first time it continued the "game" non-stop until the battery ended the actual charge (for hours)! You have to consider that i was in a place in the mountains where the gsm coverage was very low/non existent so it could be connected. But it got me worried because it couldn't control it!
Apart from a solution I'm asking also what the reason could be. It could seem like a battery problem but why would the phone actually recognize the actual charge after it powers off and I restart it ? Seems like a software problem (battery driver maybe?). But I wouldn't exclude that it could be the battery maybe when the charge gets low the voltage drops dramatically under stress to a point where the phone thinks its almost empty.
I'm using cm7.2 kang 119 with standard kernel.
Click to expand...
Click to collapse
dude i have sale some days it drops 2 a 5 times and some times not at all....

reggiexp said:
dude i have sale some days it drops 2 a 5 times and some times not at all....
Click to expand...
Click to collapse
by "sale" you meant "same"?

I have similar problems...
Mine force closes 1 out of 7 charges at a random percentage...today it was at 53%...it shows cc% but in reality the battery is drained out...I am not sure what is the problem...this showed up after I inhaled wiui 2.5.25, other than that I have minor issues with this rom...I really like it...only if I could make the radio work...

sysex said:
I have similar problems...
Mine force closes 1 out of 7 charges at a random percentage...today it was at 53%...it shows cc% but in reality the battery is drained out...I am not sure what is the problem...this showed up after I inhaled wiui 2.5.25, other than that I have minor issues with this rom...I really like it...only if I could make the radio work...
Click to expand...
Click to collapse
What kernel? Bb? Ril? Obviously your problem started when flashing wiui, have an idea what to try.....?
Sent from O2X via xda premium, beware of autocorrection

coolacrille said:
What kernel? Bb? Ril? Obviously your problem started when flashing wiui, have an idea what to try.....?
Sent from O2X via xda premium, beware of autocorrection
Click to expand...
Click to collapse
Bb=725 ril=0218(10b) the kernel is the latest OC kernel from temasek (any suggestions there, is there a better one for wiui/miui roms?).
I'll do a battery wipe after a full charge and see what happens next...

Please don't post questions in the General section
Moving to Q&A

[Q] Cynogenmod Shuts Down after Installation

Heys Guys Im having an issue with my Captivate, its was working fine for the past week. It started giving me problems like battery temps too high, cant charge, had to charge it manually, removing battery & charging it all night. All this happened when im with stock rom latest with leaked 2.3.5
& i did unlock this with changing the 01 digit to 00 in efs file.
From the past 2 days im trying to install CM10,9, 10.1..... after installation it shuts down itself. Not able to use it.
Is there any way around to make this work. If pics are needed i can provide that too.
Thanks

No reply... :/
Some one should have had an issue.

vivek90 said:
Heys Guys Im having an issue with my Captivate, its was working fine for the past week. It started giving me problems like battery temps too high, cant charge, had to charge it manually, removing battery & charging it all night. All this happened when im with stock rom latest with leaked 2.3.5
& i did unlock this with changing the 01 digit to 00 in efs file.
From the past 2 days im trying to install CM10,9, 10.1..... after installation it shuts down itself. Not able to use it.
Is there any way around to make this work. If pics are needed i can provide that too.
Thanks
Click to expand...
Click to collapse
When/how does it happen?
What are the changes/mods you made?
Did you restore anything?
Did you try different kernel settings?
Did you try flashing a different kernel (like Semaphore?) or flashing a different ROM?
I could be asking more questions but really, I dunno what causes it, I can only guess. Also a search in the CM10.1 thread might give you an answer to your SoD <-- Should've been your first step*

BWolf56 said:
When/how does it happen?
What are the changes/mods you made?
Did you restore anything?
Did you try different kernel settings?
Did you try flashing a different kernel (like Semaphore?) or flashing a different ROM?
I could be asking more questions but really, I dunno what causes it, I can only guess. Also a search in the CM10.1 thread might give you an answer to your SoD <-- Should've been your first step*
Click to expand...
Click to collapse
It just happened, battery temp too high errors, thought flashing CM9 would solve this, was bored of Stock Gingerbread, flashed corn kernel & flashed cm9 rom. I did mod anything else. That all

vivek90 said:
It just happened, battery temp too high errors, thought flashing CM9 would solve this, was bored of Stock Gingerbread, flashed corn kernel & flashed cm9 rom. I did mod anything else. That all
Click to expand...
Click to collapse
Battery temp to high is a big problem. Did you overcloak? Have you running bunch of stuff at the same time?
When it shuts down, does it reboot by itself or you have to do it manually?
Sent from my SGH-I747 using xda app-developers app

Sounds like Battery health status does not equal healthy. That forces an immediate shutdown, whether due to temperature or excessive internal resistance. That's because once a Li ion battery reaches critical temperature, it combusts and destroys your phone, burns you and anything around it, etc.
GET ANOTHER BATTERY ASAP.
Stop trying to circumvent high temperature shut down.
.........

BWolf56 said:
Battery temp to high is a big problem. Did you overcloak? Have you running bunch of stuff at the same time?
When it shuts down, does it reboot by itself or you have to do it manually?
Sent from my SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
Recently i bought a new battery, original samsung make, it states the same thing "charging paused for battery durability" sometimes "Charging stopped battery temps high". No overclocking here, just used to call, receive & wifi hotspot. Currently i charge battery in a battery charger & use it in phone.
U pointed out something right, sometimes screen just goes blank, i have to manually switch it on.
laughingT said:
Sounds like Battery health status does not equal healthy. That forces an immediate shutdown, whether due to temperature or excessive internal resistance. That's because once a Li ion battery reaches critical temperature, it combusts and destroys your phone, burns you and anything around it, etc.
GET ANOTHER BATTERY ASAP.
Stop trying to circumvent high temperature shut down..........
Click to expand...
Click to collapse
I bought a new battery & it states the same thing "charging paused for battery durability" sometimes "Charging stopped battery temps high".
But im not able to under stand, why is Cynogenmod shuts down itself after installation, can i just stop shutting down ?

vivek90 said:
Recently i bought a new battery, original samsung make, it states the same thing "charging paused for battery durability" sometimes "Charging stopped battery temps high". No overclocking here, just used to call, receive & wifi hotspot. Currently i charge battery in a battery charger & use it in phone.
U pointed out something right, sometimes screen just goes blank, i have to manually switch it on.
I bought a new battery & it states the same thing "charging paused for battery durability" sometimes "Charging stopped battery temps high".
But im not able to under stand, why is Cynogenmod shuts down itself after installation, can i just stop shutting down ?
Click to expand...
Click to collapse
I think it's not CM related but hardware related. Does this happen when not using the wifi hotspot too?
I'm thinking your battery is bad (even if new), charger is bad, connection is bad (maybe from water/humidity) or that your usb port is bad. No easy way of finding it other than testing.

BWolf56 said:
I think it's not CM related but hardware related. Does this happen when not using the wifi hotspot too?
I'm thinking your battery is bad (even if new), charger is bad, connection is bad (maybe from water/humidity) or that your usb port is bad. No easy way of finding it other than testing.
Click to expand...
Click to collapse
May be yes, the phone some times just goes blank, i have to manually switch ON. The same battery works well in my frnds phone quite well.
Port dont know, i can copy files no errors even now when i plug it in on stock gingerbread the battery doesnt charge but can copy files as before.

Since the batt works well in other phone, a couple of ideas. Perhaps silly to ask, but just checking:
did you wipe battery stats in cwm after flashing?
did you clean the phone's battery terminals with a bit of alcohol?
what's the battery health,temperature and voltage history look like, if you can get it. you can log it with battery monitor widget or similar app. set to short 1 minute interval for testing.
.........