M18™ 4.0AH REDLITHIUM™ battery

  • REDLINK™ Electronic Intelligence.
  • Overload protection to prevent battery abuse.
  • Temperature Management system to keep battery at ideal temperature.
  • Individual Cell Monitoring for optimal charge and discharge for maximum battery life.
  • Discharge Protection prevent cell damage from over-discharging.
  • For use with MILWAUKEE® M18™ cordless tools.


Voltage18 V/4.0Ah
Battery TypeLithium-ion
REDLINK™ intellegenceYes
Battery fuel gaugeYes
Warranty2 Years

Standard Equipment:

(1) M18B4, (1) Product Manual and Warranty Statement


Milwaukee® cordless power tools are backed by our heavy duty 5 year tool warranty and 2 year battery warranty.