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 and / or with previous Milwaukee® battery technology. (Results depend on tool and application) " REDLITHIUM-ION protection with Milwaukee® REDLINK™ digital overload protection to prevent 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 " Extreme hot and cold operating temperatures down to -20°C extend run time & life " On-board battery fuel gauge helps the user to maximize his battery run-time efficiency