Battery type: Li-Ion - no memory-effect Capacity: 650 mAh Voltage: 3.7 V Energy: 2.4 Wh Number of cells: 1 Weight: 16 g Compatible with the following device models: Ascom 9D41 Ascom D41 Ascom D43 Ascom R1D To ensure compatibility, please check to see whether the battery you are currently using is listed below.