Power through demanding tasks with the Milwaukee M12 4.0Ah Battery – M12 B4. Designed to deliver up to 2x more runtime, 20% more power, and 2x more battery life, this premium REDLITHIUM battery enhances your productivity with every charge. Built with integrated shock-resistant separators and individual cell monitoring, its engineered for long-term durabilityeven in harsh conditions as low as -20C. Whether youre drilling, cutting, or fastening, this battery ensures your M12 tools stay powered and protected.

Key Features & Specifications:

• Battery Capacity: 4.0Ah Li-ion
• Technology: REDLITHIUM with REDLINK overload protection
• Runtime: Up to 2x more runtime and 20% more power
• Durability: Withstands extreme job site conditions and temperatures
• Protection: Discharge protection and cell monitoring for battery health
• Compatibility: Works with all Milwaukee M12 cordless tools
• Weight: 0.4 kg
• System: M12

Charge Times:

• C12 C Charger: 80 min
• M12 C4 Charger: 80 min
• M12 TC Charger: 347 min
• M12-18 AC Charger: 115 min
• M12-18 C Charger: 80 min
• M12-18 FC / SC Chargers: 52 min

The Milwaukee M12 4.0 Ah REDLITHIUM Battery (M12 B4) is engineered to deliver exceptional performance and durability for professionals using Milwaukee’s M12 cordless tools. This high-capacity 12V lithium-ion battery offers up to twice the runtime, 20% more power, and up to twice the battery life compared to standard lithium-ion batteries and previous Milwaukee battery technology .