The Makita BL4040 40V Max XGT 4.0Ah Lithium-Ion Battery has a 3-layer moisture protection shielding cells from water ingress. It reaches full charge in 45 minutes. Digital communication between the tool and battery offers optimized performance. The heavy-duty cell casing significantly improves the battery’s impact resistance. The battery ventilation system maximizes battery life. A short circuit prevention structure protects terminals from dust and moisture.