so this is the thing, i have my phone for two years now. suddenly, my battery after charging starts to run down after 4 hours with or wthout using it. so i bought a NEW battery.. and it still does thesame!! help!!
Rechargable batteries always lose their ability to retain a charge as they get older. I've had the same problem. It's not checp, but if you purchase a genuine battery from your carrier, it should work fine. I've tried the OEM batteries on Ebay and they normally last one year and start goind dead half way through the day.
If the battery is an OEM type then look for an APP thats is running constantly. Some will drain the battery very quickly. What did you add to the basic software that came with the BB? delete one at a time to check.
I had the same problem with my curve. I tried new batteries, updating the OS and everything. I had no new apps on it, and nothing other than the basic apps running (bbm, facebook, music).
It also started to white screen, and when it crashed whilst using it I'd take out the battery and reinsert it, only to be left with no battery (despite having charged it only 2 hours ago). For me, the only fix for it was to get a new bb (the only fix that I could find anyway).