Milwaukee M18B4 4.0Ah Red Lithium-Ion Battery

Milwaukee M18 batteries deliver up to 2.5x 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 prevents users from damaging their cordless power tool investment in abusive situations.

• Individual cell monitoring ensures optimal charge and discharge for maximum life
• Durable metal 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
• Water protection routes water away from the electronics & out of the battery pack
• On-board battery fuel gauge helps the user to maximize his battery run-time efficiency
• Runtime can vary by tool, battery and application

See the full list of charging times below to find the right Milwaukee charger for you:

• M12_18 AC: 80 minutes
• M12_18 C: 80 minutes
• M12_18 FC: 52 minutes
• M12_18 SC: 52 minutes
• M1418C6: 80 minutes
• M18 DFC: 52 minutes

• Voltage: 18 V
• Battery pack capacity: 4.0 Ah
• Battery type: Li-ion
• Compatibility: All M18 tools
• Weight: 0.7 kg