Features:

• Delivers up to 3x 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
• Integrated welded frame battery construction with shock responsive separators preventing pack failure from excessive vibrations or drops
• Can be used in extreme temperatures down to -20 °C without compromising on runtime and battery life
• Discharge protection prevents cell damage from over-discharge

Comes with 2 x M12B6 6.0Ah Batteries.