i was just skimming over the forums and came accross this... i actually have the tmo branded hd2 and i bought the 3.7VDC ==2600mAh battery and i abosoltly love it. the extended back cover is made from a lite molded plastic unlike the stock stainless steel back cover so there is no real added weight to the device. Personally i dont mind the thickness either, it give you a sturdier hold on the phone so i never worry about dropping it anymore lol. i think the only down side to this chinese knock off is the kick stand broke after about a week (like i said lite plastic) but none the less for $15 i can make it through a whole day of phone use (camera,games,music and office BS) with out worrying about a charger is great. So far all the winmo roms ive used support it and all the EB kernels for android work like a charm (^_^)