Hey there!
I have been searching the net for this particular problem I am having and sofar have found nothing, so I was hoping maybe you guys could help me out.
My Thunderbolt after fully charging the battery will show at the highest about 60% battery life, if not lower. This morning for example it would only show 29%. I have bought 2 additional extended batteries for the phone, both will show around the same percent when fully charged.
I have tried doing the whole battery calibration "thing", with no success whatsoever. One time, after my phone died; I took the battery out of my phone and put it in my friends phone and it showed 82% remaining, yet my phone would say 0% and die. I have done multiple Factory Resets as well.
I've heard of a few other people having this problem and just warranting back the phone, but thats the problem. My warranty ran out a couple months ago. I had to replace my thunderbolt twice for random annoying issues, and when I got my Third phone (current), the battery wouldnt charge past 80% but i figured the battery was going out and not that big of a deal. The warranty ran out a couple months after I received my current phone so I decided to finally by addition Extended Batteries. And here I am. -_-
At most the battery will last maybe 3 hours under use, 5-6 with light use. If i leave it in standby, maybe around 8 hours. And this is with the Extended battery!
When my Phone dies, I am capable of pulling the battery out, waiting a minute, and putting the battery back in and wala! it will have a sudden 2-5% of battery life left again. I can usually do it 4-5 times before it wont work anymore.
Occasionally the phone will drain fast, get to anywhere from 19-2% and just sit at one specific percent for a few hours.
I have tried multiple charging cables including: Car Charger, Stock Phone Charger, Offbrand wall charger, and PC-USB charging.
I am thinking my phone is not reading the battery voltage correctly. When my phone stops charging, or really just sits at a random percent for forever, it shows roughly 3.822V. When the battery is "dead" according to my phone, it shows around 3.6 - 3.5V. I'm not completely sure if that is normal, or even relevant.
Any help would be most appreciated, thank you! And I apologize for the long post.
Ok back to Helping Again well since you have the Stuff i Listed how old may i ask is the Extended Battery and were you running the Battery Down to were the Indicator light flashed before Charging it. And did you fully charged it with the Phone off. That's how i have done my phones..b33 