The HiKOKI BSL36A18/J0Z Multi-Volt Battery offers unprecedented power output of up to 1080W. The power output is similar to mains powered tools when used with a 36V tool*. It automatically switches between 18V 5.0Ah and 36V 2.5Ah depending on which tool it is used in. Fast charging, charges in 32 minutes when charged with the UC18YSL3 charger.