Makita BL4050F 40V max XGT® 5.0Ah BatteryMakita BL4050F The Makita 40V max XGT Lithium Ion Battery charges faster and works longer, giving you and your cordless tools unmatched performance and productivity to take on the most demanding applications. The XGT 5. 0Ah Battery reaches a full charge in 50 minutes or less, so it spends more time working and less time sitting on the charger. XGT Batteries feature an impact resistant outer case and a shock absorbing inner liner to protect the battery