Battery type: Li-Ion - no memory-effect Capacity: 3400 mAh Voltage: 7.4 V Energy: 25.16 Wh Number of cells: 2 Weight: 102 g Dimensions (L x W x H): 13.6 x 2.2 x 1.9 cm Compatible with the following device models: Bang & Olufsen BeoPlay A2 Active Bang & Olufsen BeoPlay A2 To ensure compatibility, please check to see whether the battery you are currently using is listed below. Replacement for: Bang & Olufsen J406/ICR18650NH-2S .