M12™ 4.0 Ah battery

4.9(105 Reviews)

Leave a Review

Select Model

M12 B4

M12 B4



  • Delivers up to 2x 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™ protection with 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
View More


What's Included

Ratings & Reviews

4.9/5 from 105 reviews

Product Downloads