Battery adapters
Battery adapters promise to run one platform's tools off another's packs. Some are genuinely useful (same-brand, older-to-newer); many are cross-brand workarounds that void warranties and carry real safety risk. We have not tested these — this is an honest map of what they claim and what to watch for.
- Same-brand
DEWALT DCA1820 18V to 20V MAX Battery Adapter (Genuine)
DeWalt 20V MAX battery → dewalt-18v tools
This is DEWALT's supported bridge for many legacy 18V tools, but it is not universal: only specified 20V MAX XR packs are allowed, FLEXVOLT is excluded, and several legacy tool categories do not work. Check the manual's exact exclusions before buying.
- Same-brandAftermarket
Aftermarket DCA1820-Style 18V to 20V MAX Battery Adapter (2-Pack)
DeWalt 20V MAX battery → dewalt-18v tools
Archived for identity transparency, not recommended for purchase: this DCA1820-style clone lacks attributable manufacturer fit/safety evidence and is suppressed from commerce. Use DEWALT's genuine DCA1820 only after checking its published exclusions.
- Cross-brandAftermarket
ZLWAWAOL MIL18DL Milwaukee M18 to DeWalt 20V MAX Battery Adapter
Milwaukee M18 / M18 FUEL battery → DeWalt 20V MAX tools
Archived for identity transparency, not recommended for purchase: no attributable manufacturer or independent evidence verifies this cross-brand adapter's fit, protection behavior, or safety. It is suppressed from commerce and compatibility results.
- Cross-brandAftermarket
DM18RL Cross-Brand Battery Adapter with USB & USB-C (2-Pack)
DeWalt 20V MAX battery → Ryobi ONE+ 18V tools
Archived for identity transparency, not recommended for purchase: even the exact battery-to-tool direction is ambiguous, and no attributable source verifies fit, protection behavior, or safety. It is suppressed from commerce and compatibility results.