Makita Max XGT Cordless Tool Battery, Lithium-ion, 40 V, 4 Ah (BL4040)

The Makita BL4040 40V XGT Battery, a new cell designed for heavy-duty professional applications, boasts improved impact resistance due to its shock-absorbing internal structure. This waterproof battery features a triple layer structure and terminal walls that protect against cell failure due to water or dust. Digital communication between the battery, power tool, and charger allows for a 45-minute fast charge to 100% and an 31-minute charge to 80%. The battery's optimum charging system regulates thermal, voltage, and current during the charging cycle to prevent overcharging or overheating. Four LED battery charge level indicator lights display approximate remaining power.