Makita BL4040F 40V XGT Li-ion Battery 4.0Ah , Tabless Cells

A high output battery, designed to produce a 35% increase in power versus the standard BL4040 4.0Ah battery.
Tabless cell technology, enhanced cooling system meaning that the battery runs cooler maintaining performance under continuous heavy load.
Digital communication between the battery and the tool for an optimised performance.
WetGuard/IPX4 water resistance - a 3-layer moisture protection shields the cells from water ingress.
Heavy duty cell casing significantly improves the battery's impact resistance.
Battery fuel gauge consisting of 4 green LEDs. Optimal charging system