Battery type: Li-Ion - no memory-effect Capacity: 770 mAh Voltage: 3.7 V Energy: 2.85 Wh Number of cells: 1 Dimensions (L x W x H): 3.8 x 3.7 x 0.6 cm Weight: 15 g Compatible with the following device models: TomTom Start TomTom Start 20 TomTom Easy TomTom 1EX00 TomTom Start 2 TomTom 4EX0.001.11 To ensure compatibility, please check to see whether the battery you are currently using is listed below.