Makita Battery 40V 2.5AH. Digital communication between the tool & battery for optimised performance. Heavy duty cell casing significantly improves the batteries impact resistance. Battery ventilation system maximises battery life. Short circuit prevention structure protects terminals from dust and moisture. 3-layer moisture protection shields cells from water ingress. Cell Capacity: 2.5AH. Voltage: 40V Max. Charge Time: 28 Minutes. Code: BL4025-L