Minuteman BP48XL External Battery Pack - 48 V DC - 0.25 Hour, 0.08 Hour, 0.17 Hour, 0.05 Hour 1500 W, 1500 W, 2000 W, 2000 W Half Load, Full Load, Half Load, Full Load - Lead Acid - Maintenance-free/Sealed/Spill Proof - 3 Year Minimum Battery Life - 5 Year Maximum Battery Life - 24 Hour Recharge Time: