Milwaukee M18B5 18V 5.0Ah Redlithium-Ion Slide Battery

Milwaukee M18B5 18 V REDLITHIUM 5.0 Ah Slide Battery Pack

The Milwaukee M18B5 is a robust 18 V lithium-ion battery pack designed to power the extensive M18 tool range — providing dependable runtime and consistent power output across drills, grinders, impact tools, saws, and more.

Engineered for durability and job-site performance, this battery pack is built with Milwaukee’s advanced REDLITHIUM™ technology and enhanced electronics. It delivers significantly more runtime, power, and longer battery life than standard lithium-ion cells — ideal for demanding or prolonged work sessions. :contentReference[oaicite:1]{index=1}

• 5.0 Ah capacity, 18 V nominal voltage — gives a strong balance of power and runtime without excessive weight. :contentReference[oaicite:2]{index=2}
• Up to 2.5× longer runtime & up to 20% more power compared with older battery packs — helping you get more work done per charge. :contentReference[oaicite:3]{index=3}
• REDLINK™ digital overload protection & cell-monitoring electronics — protects your tools and the battery itself under heavy load or demanding conditions. :contentReference[oaicite:4]{index=4}
• Durable metal-frame construction with shock-responsive separators — engineered to withstand vibration, drops and other tough on-site conditions. :contentReference[oaicite:5]{index=5}
• Water-resistant design & cold-weather capability (down to –20 °C) — keeps your tools running reliably even in damp or cold environments. :contentReference[oaicite:6]{index=6}
• On-board fuel gauge — lets you quickly check remaining charge to avoid unexpected tool downtime mid-job. :contentReference[oaicite:7]{index=7}
• Full compatibility with all M18 cordless tools and chargers — slip-on “slide pack” design works plug-and-play across the entire M18 system. :contentReference[oaicite:8]{index=8}

Whether you’re cutting metal, drilling masonry, tightening bolts, or grinding concrete — the M18B5 delivers dependable power and reliable runtime to help get the job done. For tradespeople, contractors, or DIYers using M18 tools: it’s a solid mid-capacity battery that balances power, endurance and portability.