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Milwaukee

What fits Milwaukee M18 / M18 FUEL?

Milwaukee's current product pages describe the reviewed REDLITHIUM and FORGE packs as fully compatible with the M18 system. Match the M18 platform mark on the exact tool and battery; capacity, size, and weight still vary.

Voltage: 18V
Chemistry: Lithium-ion REDLITHIUM, High Output, and FORGE tabless cells.

Common tools: M18 FUEL hammer drill, M18 FUEL circular saw, M18 angle grinders, M18 SAWZALL

BatteryFits earns a commission from qualifying Amazon purchases at no cost to you. Compatibility is not a safety endorsement — verify voltage and platform before buying, and note that a buying link is not proof of fit, safety, or performance.

Evidence / fit receipt

Check the exact model, not the battery silhouette.

These are dated source reviews, not hands-on runtime or cell tests. Open a receipt to see its primary links, review window, recall boundary, and limitations.

4 exact-model receipts

Exact model 48-11-1850

Exact model 48-11-1850 is manufacturer-identified for Milwaukee's M18 platform.

Source reviewed

Reviewed: Aug 10, 2026
Review window: Through Sep 9, 2026
Public source links: 6 linked sources

Open sources, recall boundary, and limitations

Primary links

Recall boundary

Checked 2026-08-10: no exact-model match was found in the checked official sources. This bounded source check is not a guarantee that no recall exists. Check the current CPSC and Milwaukee notices again after the expiry date or before a safety-critical decision.

Limitations

Not compatible with M12 or other brands without a separate, supported interface.
This proves the manufacturer's platform identity, not independent runtime or cycle-life performance.
Capacity and feature statements are manufacturer specifications, not BatteryFits lab measurements.
Warranty eligibility and remedy depend on Milwaukee's current terms, territory, proof of purchase, and condition review.
The CPSC result found was a legacy 2007 NiCd battery recall, not either reviewed M18 lithium model.
Milwaukee's 2017 safety warning names exact model 48-11-1890, an M18 HIGH DEMAND 9.0 pack; that related M18 model is not 48-11-1850 or 48-11-1813.
Recall indexes can change after the checked date; re-check the named sources before relying on this receipt.

Correction state

Current public receipt. No superseding correction is attached to this record.

Exact model 48-11-1813

Exact model 48-11-1813 is manufacturer-identified for Milwaukee's M18 platform.

Source reviewed

Reviewed: Aug 10, 2026
Review window: Through Sep 9, 2026
Public source links: 6 linked sources

Open sources, recall boundary, and limitations

Primary links

Recall boundary

Limitations

High capacity does not establish that the pack is the best weight/runtime tradeoff for every M18 tool.
This proves the manufacturer's platform identity, not independent runtime or cycle-life performance.
Capacity and feature statements are manufacturer specifications, not BatteryFits lab measurements.
Warranty eligibility and remedy depend on Milwaukee's current terms, territory, proof of purchase, and condition review.
The CPSC result found was a legacy 2007 NiCd battery recall, not either reviewed M18 lithium model.
Milwaukee's 2017 safety warning names exact model 48-11-1890, an M18 HIGH DEMAND 9.0 pack; that related M18 model is not 48-11-1850 or 48-11-1813.
Recall indexes can change after the checked date; re-check the named sources before relying on this receipt.

Correction state

Current public receipt. No superseding correction is attached to this record.

Exact model 48-59-1808

Milwaukee states that exact charger 48-59-1808 charges all M18 and M12 battery packs.

Source reviewed

Reviewed: Aug 10, 2026
Review window: Through Feb 10, 2027
Public source links: 1 linked source

Open sources, recall boundary, and limitations

Primary links

M18 and M12 Rapid Charger

Recall boundary

This fit receipt does not establish current recall status. Check the live U.S. CPSC database using the exact model number before use or resale.

Limitations

Charge time depends on pack capacity and state of charge.
Charge time varies by battery pack; this receipt does not promise one universal charge duration.

Correction state

Current public receipt. No superseding correction is attached to this record.

Exact model 48-59-1850

Exact starter kit 48-59-1850 is manufacturer-identified as an M18 kit with a 48-11-1850 XC5.0 battery and a 48-59-1812 M18/M12 multi-voltage charger.

Source reviewed

Reviewed: Aug 10, 2026
Review window: Through Feb 10, 2027
Public source links: 2 linked sources

Open sources, recall boundary, and limitations

Primary links

Recall boundary

This fit receipt does not establish current recall status. Check the live U.S. CPSC database using the exact model number before use or resale.

Limitations

Retailer bundle contents can drift; confirm the exact kit model before ordering.
Confirm the current retailer listing still maps to the exact 48-59-1850 kit before ordering.

Correction state

Current public receipt. No superseding correction is attached to this record.

Batteries for Milwaukee M18 / M18 FUEL

Genuine OEM

Milwaukee

48-11-1850

Platform

M18

Voltage

18V

Capacity

5Ah

Type

extended-capacity

$67.97

Read Review Buy on Amazon

Genuine OEM

Milwaukee

48-11-1813

Platform

M18

Voltage

18V

Capacity

12Ah

Type

high-output

$218.38

Read Review Buy on Amazon

Chargers

Cross-Platform

Milwaukee

48-59-1808

Platform

M18

Voltage

18V

Capacity

—

Type

charger

$56.99

Read Review Buy on Amazon

Starter & combo kits

High-Output & Heavy Tools

Milwaukee

48-59-1850

Platform

M18

Voltage

18V

Capacity

5Ah

Type

kit

$110.00

Read Review Buy on Amazon

Third-party adapters: evidence not established

These cross-fit conversions are not supported by the named tool and battery manufacturers. We found no attributable manufacturer or independent evidence establishing their fit or safety, so buying exits are suppressed. They may also affect warranty coverage; check the applicable terms.

Commerce suppressed
ZLWAWAOL MIL18DL Milwaukee M18 to DeWalt 20V MAX Battery Adapter
Adapter-specific warnings
- We have not tested this adapter. A functioning Amazon buy link is not proof of safety, fit, or performance — treat any claims on the listing skeptically.
- This is a cross-brand adapter (Milwaukee battery running DeWalt tools) — the listing itself notes it is not made by Milwaukee or DeWalt, and it is unsupported by either manufacturer, which voids warranty coverage on both the battery and the tool.
- Cross-brand adapters can bypass the tool's or battery's built-in protection and communication circuitry, which normally guards against over-discharge, overvoltage, overheating, and in worst cases fire — an adapter that doesn't replicate that protection correctly is a real hazard.
- Milwaukee M18 batteries and DeWalt 20V MAX tools are different platforms by design; verify actual voltage compatibility and your specific tool's current draw before ever plugging this in.
- Genuine same-platform batteries (Milwaukee-on-Milwaukee or DeWalt-on-DeWalt) are always the safer default over any cross-brand workaround.
Read the archived safety record →

Cross-compatibility notes

M18 batteries do not fit M12 tools and vice versa. BatteryFits found no attributable manufacturer or independent fit/safety evidence for the reviewed cross-brand M18 adapter, so it is suppressed.

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