I have 3 extended batteries i would like to trade for 1500mah or something that would fit under the factory back. It is just thicker than i like. My feedback off ebay: myworld.ebay.com/jbissette HTC battery - 2150mah RHOD170 - no back. This one also made the battery indicator at the top of the phone be grayed out with an ! thru the icon Generic 2700mah, includes generic back like off ebay Generic 2200mah, includes generic back like off ebay