Cross-brand adapter
ZLWAWAOL MIL18DL Milwaukee M18 to DeWalt 20V MAX Battery Adapter
Marketed to run DeWalt 20V MAX tools from a Milwaukee M18 / M18 FUEL battery.
Read this before you buy
- 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.
Our take
A cross-brand adapter bridging Milwaukee M18 batteries to DeWalt 20V MAX tools — a fundamentally higher-risk category than same-brand adapters. We have not verified its safety or performance, and neither Milwaukee nor DeWalt supports this use. Sticking with genuine same-platform batteries is the safer default; treat this as a convenience trade-off, not a verified-safe purchase.
Upsides
- Inexpensive way to try running one brand's tools off another brand's battery if you already own both
- Useful if you're transitioning platforms and don't want dead batteries sitting idle in the interim
Risks & downsides
- Cross-brand adapter — higher risk category than same-brand adapters by nature of bridging two different battery management designs
- Not made by Milwaukee or DeWalt; no manufacturer stands behind the safety or performance of the bridge itself
- Using it voids warranty support from both brands
- We have no independent test data on heat, voltage regulation, or failure modes for this specific adapter
- Sales-rank and reviews on a cheap cross-brand adapter are not a substitute for real safety testing we haven't done
BatteryFits earns a commission from qualifying Amazon purchases at no cost to you. A buying link is not proof of fit, safety, or performance — genuine same-platform batteries remain the safer choice.
Buy on AmazonListed around $12.59 — prices change.