VINTRONS 500mAh Battery For SIEMENS Gigaset E40, Gigaset E455 ECO, Gigaset E455 SIM Twin, Capacity: 500mAh / 1.2Wh Type: Ni-MH Volts: 2.4V Size : 35.60 x 31.80 x 6.60mm Certificated with ISO9001, RoHS & CE;