phone says charge is 100% but when unplugged it goes to as low as 90%. This started happening after i installed 2.3. I tried bump charging it and it will get to 100% but if i leave the phone running while charging it, it will go to about 96% then jump to 100%. So as soon as i unplug it, it jumps from 100% back to 96%. Any ideas? Phone is unrooted.