OEM Samsung A580, A930, A990, Knack U310, Haven U320, U340, U410, U430, Smooth U350, U620 Extended Battery AB923446GZB Compatible with Samsung A580, A930, A990, Knack U310, Haven U320, U340, U410, U430, Smooth U350, U620 Extended batteries offer additional talk and standby time with very little sacrifice in size or weight. The Samsung 3.7V Lithium Ion Extended Battery uses the latest Lithium Ion Battery technology for maximum performance with minimum weight. The Samsung AB923446GZB Lithium Ion Extended Battery has a capacity of 1550mAh.