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$-12.99 USD
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SKU: DWB20-DWT18
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Run your older DeWalt 18V tools on a modern DeWalt 20V MAX battery.
The Mach 1 DeWalt 20V-to-18V adapter lets you power legacy DeWalt 18V cordless tools using a current 20V MAX battery. Keep the tools you already own in service without hunting down discontinued 18V batteries or running two separate charging systems.
Key Features
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One battery, two tool generations — use a single 20V MAX battery across your 18V and 20V DeWalt tools
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Tight-fit, secure connection — engineered for stable, consistent power delivery
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Plug-and-play — no tools or wiring needed, just attach and slide into place
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Durable, lightweight build — impact-resistant materials, compact enough for any tool bag
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Simplifies your battery system — fewer chargers and battery types to manage
Compatibility
Works with DeWalt 20V MAX batteries, including:
DeWalt 20V 5Ah, DeWalt 20V 9Ah, and other 20V MAX lithium-ion packs — browse the full range in DeWalt Batteries.
Powers legacy DeWalt 18V cordless tools, including older Ni-Cd and Li-ion platform drills, saws, and drivers.
Specifications
| Spec |
Detail |
| Input |
DeWalt 20V MAX battery |
| Output |
DeWalt 18V tool mount |
| Installation |
Plug-and-play, no tools required |
| SKU |
DWB20-DWT18 |
What's in the Box
- 1 × Mach 1 DeWalt 20V-to-18V Battery Adapter
Frequently Asked Questions
Does this adapter reduce tool performance?
No. It passes power through directly, so your 18V tool runs normally using the connected 20V MAX battery.
Will this work with any 18V DeWalt tool?
It's built for standard DeWalt 18V battery-slot tools. Check your tool's battery port before ordering to confirm fit.
Can I use my 20V MAX battery on other brands too?
Yes — see our DeWalt to Milwaukee adapter if you also run Milwaukee M18 tools.
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Why Buy from Mach 1 Lithium
Mach 1 Lithium builds adapters and battery accessories engineered for real jobsite use — solid connections, durable housings, and cross-generation flexibility that keeps your existing tools working longer.
