Battery adapters let you use batteries from one brand in tools from another. They’re useful if you’re transitioning between platforms or occasionally need a tool from a different brand without committing to a full new system. This page covers the most popular adapters available in the UK, where to find them, and what you need to know before buying.
Whether you’re a tradesperson with tools from multiple brands or a DIYer who’s gradually upgrading your kit, cross-brand adapters can save you buying duplicate batteries. The main suppliers are Amazon UK, eBay, and a few specialist retailers. This guide walks you through the best options and helps you choose the right adapter for your needs.
Quick Links by Conversion
| Conversion | Adapter Type | Guide |
|---|---|---|
| Makita → DeWalt | MT20DL / Badaptor MAK-DEW | Makita to DeWalt Adapter |
| DeWalt → Makita | DM20MK | DeWalt to Makita Adapter |
| Makita → Milwaukee | MT20MIL | Makita to Milwaukee Adapter |
| Milwaukee → DeWalt | MIL20DL | Milwaukee to DeWalt Adapter |
| DeWalt → Milwaukee | DM20MIL | DeWalt to Milwaukee Adapter |
| Milwaukee → Makita | MIL20MK | Milwaukee to Makita Adapter |
| Makita → Ryobi | MT20RY | Makita to Ryobi Adapter |
| DeWalt → Ryobi | DM20RY | DeWalt to Ryobi Adapter |
Best Makita Battery Adapters
Makita batteries are among the most popular in the UK, and several quality adapters let you use them in DeWalt, Milwaukee, and Ryobi tools. The Badaptor MAK-DEW and MT20DL adapters are the market leaders for Makita-to-DeWalt conversion.
Badaptor MAK-DEW (Makita to DeWalt)
The Badaptor MAK-DEW is a premium adapter for converting Makita 18V LXT batteries to work in DeWalt 20V MAX tools. It features solid construction, reliable contacts, and works with the full range of Makita LXT batteries (3.0Ah to 6.0Ah). The adapter sits flush with DeWalt tools and is safe for most cordless applications.
Buy Badaptor MAK-DEW on Amazon
MT20DL Adapter (Makita to DeWalt)
The MT20DL is a popular third-party adapter offering better value than premium brands while maintaining good contact quality. It converts Makita 18V batteries to fit DeWalt 20V MAX tools and is compatible with all standard Makita LXT batteries.
MT20DL Variant (Alternative)
This variant of the MT20DL offers the same functionality with improved grip and slightly upgraded contact materials. Works identically to the standard MT20DL for Makita-to-DeWalt conversion.
Browse All Makita Battery Adapters on Amazon
See our complete guides: Makita to DeWalt, Makita to Milwaukee, Makita to Ryobi
Best DeWalt Battery Adapters
DeWalt 20V MAX batteries are widely used, but adapters to fit them into other brands’ tools are less common than the reverse. The DM18M is one of the few quality options that allows DeWalt or Milwaukee M18 batteries to work in Makita tools.
DM18M Adapter (DeWalt/Milwaukee to Makita)
The DM18M converts DeWalt 20V MAX or Milwaukee M18 batteries to fit Makita 18V tools. It’s compatible with both DeWalt and Milwaukee batteries, making it useful if you own tools from both brands. Build quality is good, and contacts are reliable.
Browse All DeWalt Battery Adapters on Amazon
See our complete guides: DeWalt to Makita, DeWalt to Milwaukee, DeWalt to Ryobi
Best Milwaukee Battery Adapters
Milwaukee M18 and M12 are professional-grade platforms with fewer third-party adapters available compared to Makita. Most conversions are targeted at using Milwaukee batteries in other brands’ tools rather than the reverse. Check our dedicated guides for the latest options in the UK market.
Browse All Milwaukee Battery Adapters on Amazon
See our complete guides: Milwaukee to DeWalt, Milwaukee to Makita
What to Know Before Buying an Adapter
Battery adapters are practical, but they have real limitations. Understanding these before you buy will help you choose the right solution for your needs.
Smart Battery Features Don’t Transfer
Most modern batteries include digital fuel gauges and overload protection built into the battery pack. When you use an adapter, the tool’s electronics don’t recognise these features. You lose the battery’s fuel gauge display, and the tool may not have the same overload or thermal protection. This isn’t a safety issue for normal use, but it means you’re running slightly “blind” on remaining runtime.
Not Recommended for High-Draw Tools
High-demand tools like circular saws, angle grinders, and reciprocating saws draw serious current and generate heat. An adapter creates an extra contact point, which can introduce resistance. Using adapted batteries in these tools risks overheating the battery and adapter contacts. Stick to lighter-duty applications like drills, drivers, lights, and sanders.
No Manufacturer Warranty
Power tool manufacturers don’t warrant adapted batteries or the tools used with them. If something goes wrong, you’re not covered. This is uncommon in practice, but it’s important to know the risk before relying on an adapter for critical work.
Quality Varies Significantly
Cheap adapters may have loose contacts, poor build quality, or incompatible dimensions. Spend a bit extra for a known brand like Badaptor or established third-party makers. You’ll avoid loose connections and premature wear.
Check Compatibility Before Ordering
Not all adapters work with all batteries or tools. Makita LXT is different from Makita G-Series, and some adapters only fit certain DeWalt or Milwaukee generations. Always verify the specific battery and tool models before purchasing.
UK Retailers Beyond Amazon
Amazon UK is the primary source for battery adapters, but a few specialist retailers occasionally stock them:
Screwfix — Stock the Badaptor brand in-store at selected locations. Call ahead to check availability, as inventory varies by branch.
Toolstation — Occasionally stock specialist adapters. Check their website for current range, though availability is limited compared to Amazon.
eBay UK — A wide range of adapters, often from international sellers. Prices can be lower, but shipping times may be longer. Check seller ratings carefully.
Specialist online retailers — Smaller retailers like Battery Bargains and tool-focused shops occasionally stock adapters, but availability is unpredictable. Amazon is still your most reliable option for consistent stock.
Watch: Video Guide
Frequently Asked Questions
Are battery adapters safe to use?
Yes, adapters are safe for normal use in light-to-medium duty tools. They simply bridge the connector gap between two different battery platforms. Use them for drills, drivers, lights, and sanders. Avoid high-draw tools like circular saws and angle grinders, where the extra contact resistance can cause overheating.
Do adapters void my tool warranty?
Using an adapter on a tool will likely void the manufacturer’s warranty for that use. Most power tool makers don’t warrant their tools when used with non-original batteries or adapters. If the tool fails, the maker can refuse the claim if an adapter is involved.
Can I use an adapter with a circular saw or angle grinder?
Not recommended. These high-draw tools generate significant current, and the extra contact point created by an adapter introduces resistance. This can cause the battery and adapter to overheat, damaging both. Stick to adapters on lighter tools like drills and drivers.
Which is the best battery adapter brand?
Badaptor is widely regarded as the premium option, with solid construction and reliable contacts. Third-party makers like MT20DL and DM18M offer good value without compromising quality. Avoid very cheap adapters under £10, as contact quality is often poor.
Do adapters work with all batteries in a platform?
Most adapters work across a platform’s capacity range (e.g., Makita LXT adapters work with 3.0Ah, 4.0Ah, 5.0Ah, and 6.0Ah batteries). However, some newer or specialist batteries may not fit. Check product reviews or contact the adapter maker if you have a newer battery variant.
Where can I buy battery adapters in the UK?
Amazon UK is your best option for choice, price, and reliability. eBay UK offers alternatives, often with competitive pricing. Screwfix and Toolstation stock adapters in-store, though availability varies by location. Always check reviews before buying, especially from lesser-known sellers.
Explore the Full Adapter Range
For detailed information on specific adapters, compatibility rules, and performance across different tool types, visit our main Power Tool Battery Adapters guide. You’ll find in-depth reviews, direct comparisons, and advice on choosing the right adapter for your situation.
