This HiKOKI UC18YSL3JEZ Starter Pack contains the following: 2 x 18/36V BSL36A18/J0Z Multi-Volt 5.0/2.5Ah Li-ion Batteries. The Multi Volt Battery offers unprecedented power output, similar to mains powered tools when used with a 36V tool*. The battery has a compact, lightweight design and is similar in both size and weight to the existing 18V 5Ah and 6Ah batteries. It also features a 4-stage battery level indicator with a diagnostic function. Compatible with the existing range of Hitachi/Hikoki 18V slide battery tools and the new range of 36V Multi Volt tools. Compatible with existing 18V chargers and the new UC36YSL. *Not compatible with previous non-Multi Volt 36V tools. 1 x 14.4-18V UC18YSL3 Rapid Smart Charger is suitable for slide type Li-ion batteries. It provides the industry's fastest charging time of approx. 32 minutes for 5.0Ah battery and 38 minutes for 6.0Ah battery. Cutting edge 3-way protection technology prevents the battery from overcharging and overheating. It has a large charge indicator lamp with 4-colour LED status lights and a USB port for charging small portable devices.