ok, so I bought one of these on ebay from a us seller. it cost a couple dollars more than buying it from china or hong kong, but the added bonus of getting it in 2-3 days as opposed to 2 weeks was certainly appealing. anyway, I've charged this thing up, let it run all the way down, tried anything I could think of, but no matter what the battery doesn't last as long as the default stock battery. if anyone has one that is actually working properly, can you please tell me how you charged it, for how long, and what you did. at this moment, i see no need to have the big door on the back of the evo and ill just use the stock battery. where am i messing up?