Milwaukee M12B4 M12 12V Li-Ion RED LITHIUM Battery – 4.0Ah




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, M12B4, 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 -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.


  • REDLINK PLUS Electronic Intelligence enables advanced communication between your batteries and tools, allowing for unmatched levels of performance, protection, and productivity
  • Fuel gauge onboard displays remaining runtime for less downtime on the job
  • Powers more than 50 MILWAUKEE M12 cordless power tools
  • Best-in-class construction offers long lasting performance and durability


  • Voltage: 12V
  • Battery Capacity: 4.0Ah


  • 2 Years Warranty covered by Milwaukee Australia