This ryobi 2 piece pack contains an 18 volt 15ah lithium43 battery and a super charger the ryobi one43 18v li ion battery is a powerful 15ah lithium43 battery that gives 10 more performance and up to 35 more runtime than standard batteries it has a built in fuel gauge that helps you check battery levels without using an external machine and also allows users to manage their workload more efficiently the intellicell technology monitors and balances individual cells maximising runtime storag