As we all know...the indulge battery life is super poor. So i went ahead on ebay and saw that they had a 3600 mah battery as well as a 3500(black and white color) mah battery. I went ahead and purchased the 3500 mah because it was located in the US, and I didnt want to wait a million years for the 3600 mah battery to come from hong kong. Here are my thoughts on the 3500 mah battery... Its disappointing to say the least. However, it does last a few hours longer than the stock battery. I only managed to get about 5 and a half hours of usage from it doing some moderate browsing and sending text. and the phone would say the battery was fully charged wen it was only @ 80 percent.Does anybody else have experience with the 3500mah battery??? I was checking out the reviews on the 3600 mah battery on these forums...and the majority of people are raving about it saying it last 12 hours etc etc. Im about to order the 3600 and wait the 12 days fo it to get to me from hong kong. it seems totally worth the wait. Does anybody have both the 3500mah and the 3600mah??? how do they both compare?