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Milwaukee 18V REDLITHIUM 5 Ah Lithium-Ion Battery

Extended 5Ah runtime and REDLITHIUM durability keep your whole M18 tool lineup running through long workdays.
Milwaukee MPN 48-11-1855R
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

In-Store Exclusive

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This Milwaukee item is one you'll find in stores rather than online — and that's often the better way to buy. In store you get the genuine article, full manufacturer warranty, and real advice from someone who's actually handled it — no counterfeits, no gray-market resellers.

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About Product Overview

This is the Milwaukee M18 REDLITHIUM 5.0Ah battery, a straightforward power source built for anyone running a fleet of M18 tools on the jobsite or around the shop. REDLITHIUM cells are engineered to deliver more work per charge and hold up under heavy, repeated use, which matters when you're cycling through drills, saws, and other M18 gear all day. At 5 amp hours, it gives you solid runtime before you need to swap packs, and compatibility across the entire M18 lineup means one battery works across your whole kit instead of juggling mismatched packs. Weighing in at 1.72 lbs, it's manageable to carry on a belt or toss in a bag between stops. Whether you're a tradesperson who needs dependable runtime through a full shift or a homeowner who's already invested in M18 tools, this battery slots in as a reliable backup or replacement. It ships in clamshell packaging, one battery per package.

  • Lithium-Ion battery, REDLITHIUM sub-brand
  • 18V, 5.0 Amp Hours
  • Compatible with Milwaukee M18 Tools
  • Charge time: 105 minutes
  • Weight: 1.72 lbs
  • One battery per package

The Details Specifications

Ships Ground Travels by ground for safe handling — common for items with a lithium battery, aerosol, or liquid inside. Nothing extra to do on your end; it simply ships by truck instead of by air.
Brand Milwaukee
Model / MPN 48-11-1855R
UPC 045242998104
Weight 2 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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