When you plug it into a power source and turn on the display there should be a percentage for how charged your battery is. When you are charging it does it go from 60%-61% or does it go by increments of ten like 60%-70%? I am trying to diagnose my phone and I just traded in my thunderbolt yesterday and the battery was charging extremely slowly and so is this one but it is a new phone so that could be the issue because the first few charge cycles may be slow but I don't know if it is taking forever to charge 1% or if it is supposed to be charging by increments of 10%. Because it keeps taking forever (like 40 minutes) to charge and then it spikes up by 10%. Is that normal with a new battery or is this a software with some application(s) which carried over from my Thunderbolt? Thanks