Battery problem

[papped]

There's definitely something weird.

Today my battery went from 100% to 60% in 2 hours signed on to IM+ only, not even actively im'ing anyone and no emails received really.

Other days I can go 8+ hours actively IM'ing and receiving several emails throughout the day and even short phone calls.

My phone is sitting in the exact same area at work on any of these days, so the signal strength is basically identical.

Makes no sense...