I use Battery Time Lite to keep track of my battery life as it gives you the actual battery percentage instead of every 10%. When I put an extended battery in the phone and charge it to full(and get the green light indicator), it almost instantly goes down to 95% or 94% after I unplug it. I watch it drop from 100% to 94% over the course of about three minutes. If I wait a few extra minutes, then plug it back in, sometimes I can get it to where it will stay at the full level for a normal period of time, sometimes it will still drop some. This has happened with both the HTC 1500Mah battery and the Amzer 1800Mah battery. It seems to me that the phone is tuned only for charging the stock 1300Mah battery, and therefore doesn't fully charge the extended batteries because the phone thinks it's full once 1300Mah is charged. Was wondering if anyone else who uses extended batteries has noticed this problem?