Battery type: Li-Ion - no memory-effect Capacity: 800 mAh Voltage: 3.7 V Energy: 2.96 Wh Colour: black Number of cells: 1 Weight: 29 g Compatible with the following device models: Ascom D63 Ascom DH7 Ascom DECT 3735 Ascom i63 To ensure compatibility, please check to see whether the battery you are currently using is listed below. Replacement for: Ascom 490933A Ascom 660497 Innovaphone 490933A .