The ryobi rb 18l50 one43 18v battery is ideal for users who demand the maximum run time and performance from their one43 tool the tough pack design with overload protection give long term durability ryobis intelli cell individual cell monitoring maximises run time and performance this battery is compatible with both old current and new ryobi one43 tools giving you access to the use of over 40 garden and power tools battery capacity 50ah battery chemistry li ion voltage 18 volt