2600mAh Li-ion Extended Battery for Garmin StreetPilot C320, StreetPilot C340, StreetPilot C330, StreetPilot C530, StreetPilot C550 Capacity: 2600mAh / 9.62Wh Type: Li-ion Volts: 3.7V Size : 66.09 x 20.00 x 18.06mm Certificated with ISO9001, RoHS & CE;