Battery2go - 1 year warranty - 3.7V Battery For TomTom VF6M, 4ER41, Go Live 825, AHL03711022, 4ER51, Go 820, 4EJ51 Capacity: 1000mAh Type: Li-ion Volts: 3.7V Size : 43.80 x 35.80 x 6.70mm Certificated with ISO9001, RoHS & CE;