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Help Phone shutting off even with full battery

C

Corwin18

Lurker
Hey,

So I started having an issue with my Galaxy s2 today.

The phone was working fine while plugged in, and had a near fully charged battery, but when I unplugged it, it shut off after a few minutes.

I tried turning it on several times (while unplugged), and it gets to the initial loading screen, but then shuts off before ever actually getting to the main phone screen.

If I try turning it on while plugged in, I can usually get to the main phone screen (but not always), but it still shuts off after about 5-20 seconds (even while plugged in). It shows the battery as nearly full still.

I have tried removing the battery, I have tried resetting the cache, I have even done a factory reset, but nothing seems to work. I was thinking it was the battery, and am willing to buy a new one but I just wanted to make sure that that would even fix it.

The reason I am second guessing whether it is the battery or not, is because even while unplugged, if I can reach the recovery mode screen (some times it shuts off before I can even get there), the phone seems to be able to stay on indefinitely. I have currently left it at the recovery mode screen to try and drain the battery completely to see if maybe I can reset the battery that way (if that's the issue at all).

Has anyone had a similar experience and was able to fix it? Any help or suggestions are appreciated.

Thanks
 
That's very strange that the phone will stay in recovery mode but not in system. That suggests that it's not the battery (although recovery will use a lot less battery than the system I'd gueas)
I'd maybe go into a small independent phone shop and ask to try a new battery on the promise that you'll buy it if it works (shops in my area will do this no problem but I live in Scotland so don't know what shops are like where you are)
If that fails then I think a reflash might work so come back for advice on that.
Do the battery first as reflashing your phone will wipe your data
Good luck
 
Thanks for the advice. I went to a little tech shop near by and tried a battery. Seems to have fixed it. Gave me the battery for 15$, and considering the alternative (if it was the phone and not the battery), I am pretty relieved. I had already done a factory reset during my attempts at fixing, so data is already wiped, I'm pretty sure I have a backup on my comp at home, so that should be no problem.

The guy at the shop said it could be that because I often keep it near fully charged or plugged in, the phone (or battery memory) considers it to actually be empty when it's not. He suggested I leave it out to drain, and try recharging it, and maybe it would return to normal.

I'm probably due for a new phone anyways, the S2 I s a pretty old model in phone years, but I'd rather do it on my terms then be forced by a phone error.

Thanks again for the help.
 
No problem and modern (li-ion) batteries don't have "battery memoey" so he was wrong there. You should full charge and discharge it once though to calibrate the battery monitor.
It's fine to keep on charge but batteries have a "life time" of charges and yours was a bit old.
Glad you got it fixed mate :thumbsupdroid:
PS $15 was a good price if it's genuine :)
 
Ya, I've been reading up on it since I figured out what it was. You're right about the no memory thing from what I've seen. But, it still seems it's recommended to recalibrate (fully drain and charge) once in a blue moon for whatever reason.

Now that I think about it, it may have been plugged in when we had quite a lightning storm, so it's possible that's what finally did it in. Or the most obvious answer, it's just an old battery

He had new ones for 35$ but none fit my phone. Pretty sure this one is used, but it is a Samsung S2 battery, and has been holding the charge unbelievably well. Granted my phone has absolutely nothing on it a the moment, but staying at the same % charge for a few hours is pretty impressive based on what the old one was doing. I don't know how many customers you have asking for batteries for a phone that's 4 or 5 generations old.
 
Lol yeah true you were probably lucky to find one in a shop like that.
A lightening storm could definitely be the cause I'd say (although I think a fuse would have blown before anything got damaged but certainly a possibility) :)
 
PS for future reference, Amazon (the UK version anyway) has new s2 batteries varying wildly in price :thumbsupdroid:
 
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