Milwaukee M18 HB5.5 18V 5.5Ah Li-Ion RedLithium High Output Battery

Provides up to 50% more power and 30% more runtime than standard M18 RedLithium-Ion battery packs. Durable metal frame battery construction with shock-responsive separators preventing pack failure from excessive vibrations or drops. Individual cell monitoring ensures optimal charge and discharge for maximum life. Water protection routes water away from the electronics and out of the battery pack. Can be used in extreme temperatures down to -28?C without compromising on runtime and battery life