Battery type: Li-Ion - no memory-effect Capacity: 2000 mAh Voltage: 21.6 V Energy: 43.2 Wh Colour: black Number of cells: 6 Weight: 392 g Dimensions (length x width x height): 13.7 x 7.8 x 4 cm Short-circuit, overcharge and overheating protected Compatible with the following device models: Hoover .