Battery type: Li-Ion - no memory-effect Capacity: 800 mAh Voltage: 3.7 V Energy: 3 Wh Number of cells: 1 Weight: 18 g Compatible with the following device models: Siemens Gigaset SL785 Siemens Gigaset SL780 Siemens Gigaset SL788 Siemens Gigaset SL78H To ensure compatibility, please check to see whether the battery you are currently using is listed below.