you can expect up to 2.5x more run time, up to 20% more power and up to 2x more battery life with this 5.0Ah battery compared to other models The Milwaukee M18 B5 is a robust and durable 5.0Ah 18V battery designed for use with all tools in the Milwaukee M18 range. It offers extreme runtime, power and battery life even in robust conditions and extreme temperatures down to -20°C. REDLITHIUM protection with REDLINK digital overload protection prevents users from damaging their cordless power tool investment in abusive situations. This battery will charge in just 59 minutes with the M12-18 FC charger. Features:   Delivers up to 2.5x more run time, up to 20% more power and up to 2x more battery life compared with other Lithium-Ion technologies REDLITHIUM protection with REDLINK digital overload protection prevents users from damaging their cordless power tool investment in abusive situations Individual cell monitoring ensures optimal charge and discharge for maximum life Durable metal frame battery construction with shock responsive separators preventing pack failure from excessive vibrations or drops Water protection routes water away from the electronics & out of the battery pack Can be used in extreme temperatures down to -20°C without compromising on runtime and battery life On-board battery fuel gauge helps the user to maximize his battery run-time efficiency Specification:  Weight: 0.6kg Voltage: 18V Capacity: 5.0Ah Charge time M12-18FC charger: 59 min