Provides longer work time for increased performance and productivity. Charges in 55 minutes using the Makita rapid charger with an LED charge level indicator. Same weight and size as 5.0Ah, 4.0Ah, and 3.0Ah batteries. Features STAR Protection Computer Controls for overload, over-discharge, and overheating protection. Lithium-ion technology ensures long, sustained performance. Overload protection cuts power during high current draw to protect the tool and battery. Over-discharge protection monitors battery charge capacity and cuts power to extend battery life when charge is too low. Overheat protection monitors battery temperature and cuts power if it reaches a certain level to prevent damage and extend battery life.