HTC Branded OEM Battery
http://www.amazon.com/gp/product/B00...ef=oss_product
and this case and battery
http://www.amazon.com/gp/product/B00...ef=oss_product
I dont plan on letting that cheap battery anywhere near my EVO, will EBAY it or give it to a homeless guy, but the case could hold my HTC branded battery just fine... hopefully it fits.