Keep extra batteries on hand so you can continue working while your other batteries recharge. This 40-volt 2 AH Earthwise battery fits the 40-volt Cordless Electric Lawn Mower. Note: Dual batteries are needed for this mower: one 40-Volt 2 AH and one 40-Volt 4 AH, sold separately. High-quality battery maintains consistent power for entire run time. Recharges in approx. one hour. Charger sold separately.