1)5520 battery 2)100% compatibility 3)long working ... long working time4)Best quality Professional manufacturer of laptop battery,one year warranty,CE ROHS FCC Certificates, 100 ... performance of our laptop batteries Products sepcification5520 battery1)Battery type :Li-ion2)Volt:11.1V3)Capacity:5200mah4 ... , Reputation is first Best Price notebook battery for acer 5520 5300 5310 5320 5330 5520G 5530 5530G