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Product Details

Delivers up to 2X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The M12™ 4.0Ah REDLITHIUM-ION™ Battery Pack features superior pack construction, electronics and performance to deliver more work per charge and more work over pack life than any battery on the market. It offers 4.0 amp-hours of runtime. With Milwaukee durability built into each pack, this battery runs cooler and performs in climates below 0°F/-18°C.Managed by Milwaukee’s exclusive REDLINK™ Intelligence, the battery features overload protection to prevent you from damaging your cordless power tools in heavy-duty situations, while the discharge protection prevents cell damage. The temperature management system and individual cell monitoring help maximize battery life.


  • Fuel gauge onboard: Displays remaining runtime for less downtime on the job
  • Versatility: Powers more than 50 MILWAUKEE® M12™ cordless power tools
  • Best-in-class construction: offers long lasting performance and durability

Model Options

Item/Cat #  
M12™ 3.0Ah REDLITHIUM-ION™ Battery Pack
M12™ 2.0Ah REDLITHIUM-ION™ Compact Battery Pack
M12™ 3.0Ah REDLITHIUM-ION™ Compact Battery
M12™ 4.0Ah REDLITHIUM-ION™ Battery Pack
M12™ 6.0Ah REDLITHIUM-ION™ Battery
M12™ 1.5Ah REDLITIUM-ION™ Starter Kit
M12™ 2.0Ah REDLITHIUM-ION™ Starter Kit