need help identifying an P168c part

[pcjiet]

Hi, I need help, i dont know what part is the one marked in red arrow in the pic.

Its an P168c chinese phone mother board photo from a working one, mine dont have that part, it seems cracked I think is a BT1 or something like that.

The other problem is when I turn on the phone, all works fine, and the lcd displays the info for a few seconds and then the lcd turns off, but the phone is still working. then a few more seconds the screens turn on again for a couple of secs an then off again. when the lcd is on and i press a button it goes off. i dont know if that BT1 part is the problem.

I was searching over internet but didnt find anything, and i think mabe in this forum i can get some help.

[kikkoman]

Re: need help identifying an P168c part

that's a coin cell (probably rechargeable).
i doubt that it explains the problems; its job is to keep the phone's settings (RTC etc) when switched off.
did that board get wet at some point?

[PCBONEZ]

Re: need help identifying an P168c part

Yes that's a coin cell battery and it won't cause the LCD problem.

Sounds like the main battery is shot and the phone is trying to go into power save mode as you use it, or, just doesn't have enough juice to keep the screen lit.
Also could simply be a bad connection to the screen or a failing back-light.
.