My phone battery fully charged and on standby last 2-3 days,but when I use the phone, my battery strength drops very fast .Talk time is maybe 10 min.
and then phone beeps low battery , I stop talking and the battery strength comes back up to 3 bars out of 4. this is a 1000mAH LG battery.
I bought a new 1100mAH LG battery and installed it and it shuts the phone off. Any clues as what could be the problem? I know this phone is an older model but I still like it .Also flash for camera stays on all the time so I have to turn on and off manually.

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