i havent seen this brand pop up on this forum before, but figured id let you guys know. i bought 4 of the 5ah 70c 4s lipos. the price is about the same as a 25c zippy pack!. i read alot of great reviews on other forums. alot of quad copter guys run them cause they need the high discharge. figured id give em a shot http://www.chinahobbyline.us/product/list/93.jhtml