Two 12 volt sealed gel cell batteries assembled in battery case for powered stair climbing hand truck.

IMPORTANT BATTERY CHARGING NOTE: The battery must be charged within 3 months of storage to prevent self-discharge. If the battery is not charged within 3 months of storage, permanent loss of capacity may occur. If the powered product will be used regularly, it is recommended that the unit be kept on a charger whenever it is not in use; the batteries will not overcharge. If the powered product is going to be stored and/or not in regular use, the batteries must go through a full charge cycle every 2 weeks to ensure battery life and duty cycle.