no idea what "brand" this battery is but it is a ego-t 5 click batt. its long as hell so ide geuss 900 or 1100 mah. it only works with one out of 3 brand new ego attys and the flavor/hit is extreamly weak, i cleaned it well and that didnt help at all, i mean it works everytime all day long holds charge fine and all its just not hitting barly. is this thing junk or do you think i might beable to use carto's on it? or ? thank you!