Delivers up to 3 times more run time, up to 20% more power, and up to 2 times more battery life compared with other lithium-ion technologies and/or previous Milwaukee battery technology (results depend on tool and application). 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. Integrated welded frame battery construction with shock responsive separators prevents pack failure from excessive vibrations or drops. Can be used in extreme temperatures down to -20 °C without compromising on run time and battery life. Discharge protection prevents cell damage from over-discharge.