Spare rechargeable battery, for electric drive, 25.9 V, 12 Ah, 311 Wh. Supplied = assembled. Battery version = lithium-ion battery (Li-ion) Battery capacity = 12 Ah. Voltage = 25, 9 V. Operating time = 8 hrs. Charging time = 6 hrs. Product type = rechargeable batteries. High power density. Long service life. Fast charging times. Battery charger optionally available.