My battery on my first G1 was great,no complaints after 5-6 charge cycles,however no so much luck with a replacement G1 ( a new / sealed unit ) charged it up overnight,unplugged at 6am,it sat on my desk till 9am when I went to make a call it was at 12% and about dead....
Tried 4 more cycles and it was crap and the rear bottom got pretty warm a few times,went in to the local t-mobile store,no new ones,gave me one from a return phone,so no idea how many cycles it has or if it was disturbed during a charge....and now this one the battery icon drops 1/4 with in a half hour of just sitting idle,made a 4 minute call,it dropped to half.....
Called the store back and he was happy to try another used battery....as he has no new ones and has no idea when he will....so called t-mobile,got to the first stooge,sent me to stooge #2 and after 5-6 minutes on hold they disconnected me .......

t-mobile.....