Just give you my battery story:
7100t (new...4 days old). Running Verichat (3 mediums). Read about 15 emails. Talked for about 3.5 hours (Bluetooth). Left Verichat and Bluetooth running all day.
Unplugged phone at 7:00 AM and around 4 PM I got the Beep telling me my battery was low. Don't know if this is good battery performance or not. I will be buying the Standalone Battery charger and spare battery to swap them out I think.