Battery type: Li-Ion - no memory-effect Capacity: 1800 mAh Voltage: 3.7 V Energy: 6.66 Wh Colour of rear cap: black Height: approx. 0.9mm Number of cells: 1 Weight: 41 g Compatible with the following device models: Nokia 6310i Nokia 7110 To ensure compatibility, please check to see whether the battery you are currently using is listed below. Replacement for: Nokia BLS-2 Nokia BLS-2N Nokia BLS-4 Nokia BMS-2S Nokia BPS-2 .