Battery type: Li-Ion - no memory-effect Capacity: 950 mAh Voltage: 3.7 V Energy: 3.52 Wh Number of cells: 1 Weight: 24 g Compatible with the following device models: Spectralink 5020 Spectralink 7520 Spectralink 5040 Spectralink 7212 Spectralink 7502 Spectralink 7202 Spectralink 7532 Spectralink 7522 Spectralink 3040 To ensure compatibility, please check to see whether the battery you are currently using is listed below.