If you’ve invested heavily in the Milwaukee M18 platform but fancy trying some Makita 18V LXT tools without buying a whole new battery ecosystem, an adapter is your answer. Battery adapters let you use M18 batteries in LXT tools, making them genuinely useful if you’ve got surplus Milwaukee stock or want to test a premium Makita tool before committing to their batteries.
The catch? You’re not gaining anything new — you’re just accessing a different brand’s tool selection with batteries you already own. But for site engineers and contractors with mixed tool collections, that flexibility has real value. This guide covers the best Milwaukee to Makita adapters on the UK market, what they cost, and whether they’re actually worth buying.
How Battery Adapters Work
Milwaukee M18 and Makita 18V LXT batteries are both 18V nominal voltage, but they use completely different mechanical and electrical connectors. An adapter acts as a physical bridge: the Milwaukee battery slides into a housing on one end, and a Makita-compatible interface extends from the other. The adapter handles the voltage passthrough — there’s no conversion happening because both platforms operate at the same voltage.
The adapter adds about 2–3 cm to the overall depth of your tool, which can be tight in confined spaces like ceiling work or between wall studs. Most importantly, adapters do not include built-in charging or smart cell monitoring — they’re purely mechanical interface converters. This means you’ll still need your Milwaukee charger to recharge the battery, even when it’s mounted in a Makita tool.
Best Milwaukee to Makita Adapters
Badaptor MIL-MAK — Premium Option
The Badaptor MIL-MAK is the gold-standard adapter for users who want maximum durability and reliability. It features precision-engineered connectors that reduce wiggle and ensure solid contact, critical for high-amp-draw tools like impact drivers or circular saws. The housing is injection-moulded hard plastic with reinforced contact points — not the flimsy stuff you’ll find on generic imports. Badaptor backs every adapter with a 2-year warranty and delivers from UK stock, so you’re not waiting weeks for shipping.
The main trade-off is price: you’ll pay £23–29, roughly double what some generic adapters cost. But if you’re running professional jobs and can’t afford tool downtime, this is the one. Badaptor adapters are engineered to handle repeated insertion cycles without connector fatigue.
Buy Badaptor MIL-MAK on Amazon
MT20ML — Best Value
For occasional users or those testing the concept, the MT20ML generic adapter delivers solid performance at a fraction of the Badaptor price. At £17–22, you’re getting a functional adapter with decent connector geometry and acceptable plastic housing. It won’t win any durability awards, and connector wear becomes noticeable after 50+ tool swaps, but for DIYers or one-off job sites, it’s perfectly adequate.
The MT20ML is widely available on Amazon UK and ships quickly. Reviews are mixed — some users report loose connections after several months; others report years of trouble-free use. It’s luck of the draw with batch quality, which is typical for commodity adapters. If you’re only using it a handful of times a year, this is sensible economics.
DM18M — Most Versatile (Multi-Brand)
If you’ve got batteries from multiple brands scattered around the workshop, the DM18M multi-adapter might be the smartest buy. This clever design accepts both DeWalt 20V MAX and Milwaukee M18 batteries and converts them to Makita LXT compatibility. You get one adapter that handles two different battery platforms — genuinely useful if you’ve inherited tools or work on mixed-fleet sites.
The DM18M also features a USB-C charging port integrated into the housing, so you can top up small devices in the field (phone, site light, etc.). It’s not powerful enough to charge a power tool battery, but it’s a neat bonus for tradespeople. At £18–25, it’s a small premium over the MT20ML but vastly more flexible. The catch: the multi-interface design makes it slightly bulkier, and some users report the DeWalt side is tighter than the Milwaukee side out of the box.
Buy DM18M Multi-Adapter on Amazon
Adapter Comparison Table
| Adapter | Input Battery | Price Range | Warranty | Extras | Best For |
|---|---|---|---|---|---|
| Badaptor MIL-MAK | Milwaukee M18 | £23–29 | 2 years | Precision connectors | Professional use, high-amp tools |
| MT20ML | Milwaukee M18 | £17–22 | None stated | None | Casual DIY, low-frequency use |
| DM18M | Milwaukee M18 + DeWalt 20V MAX | £18–25 | 1 year (typical) | USB-C charging port, dual-input | Mixed-brand tool collections, field charging |
Compatible Milwaukee M18 Batteries
Any Milwaukee M18 battery will fit an adapter and work in Makita LXT tools. The most common models in the UK are:
- 48-11-1860 — 6.0Ah, premium for extended runtime
- 48-11-1850 — 5.0Ah, the workhorse M18 battery
- 48-11-1840 — 4.0Ah, mid-range capacity
- 48-11-1830 — 3.0Ah, lightweight option
- 48-11-1820 — 2.0Ah, compact, rarely used now
Larger-capacity Milwaukee batteries like the 8.0Ah (48-11-1870) and 12.0Ah (48-11-1880) also work perfectly, but note that bigger batteries add noticeable weight and depth to the adapted tool. For overhead work like ceiling drilling or grinder use, stick with 4.0Ah or smaller to keep fatigue down.
What You Need to Know: Limitations
No smart charging through the adapter. The adapter is a dumb mechanical interface — it doesn’t include the battery management circuitry that Makita chargers can access. This means you absolutely must use your Milwaukee charger to recharge the battery. You cannot plug an adapted battery into a Makita charger and expect it to work. This is the biggest limitation and why adapters are only for people who already own Milwaukee infrastructure.
Not suitable for extremely high-draw tools. Makita’s heaviest tools — large impact wrenches, angle grinders running 125mm discs, or rotary hammers in demolition mode — demand consistent, clean power delivery. Milwaukee batteries are excellent, but adapters introduce a tiny bit of contact resistance. For professional demolition work, buy proper Makita batteries. For general site work and DIY, adapters handle everything fine.
Added depth is real in tight spaces. The 2–3 cm adapter body can make a genuine difference when working between studs, in ceiling voids, or against walls. Test the fit before committing to an adapter on a job.
Connector wear happens faster than direct mounting. Because the adapter adds a connection interface, the overall system experiences slightly more mechanical wear. Professional users replacing adapters every 1–2 years isn’t unusual. Casual users might get 3–4 years. This isn’t a reason not to buy; it’s just the reality of the interface design.
Frequently Asked Questions
Can I charge a Milwaukee battery inside a Makita tool using a Makita charger?
No. An adapter is not a smart interface — it has no way to communicate with the Makita charger. You must remove the battery from the Makita tool, take off the adapter, and charge it in your Milwaukee charger. This is non-negotiable and why adapters work best when you already own Milwaukee charging infrastructure.
Will a Milwaukee-to-Makita adapter damage either battery?
No. Both platforms operate at 18V nominal, and adapters simply bridge the mechanical interface. Your battery experiences no electrical stress. However, repeatedly inserting and removing the adapter from tools will eventually wear the battery’s connector pins — just like normal use wears down connectors. Buy good-quality adapters like the Badaptor and this wear happens slowly.
Can I use a Milwaukee battery in a Makita charger with an adapter?
No. Makita chargers include smart-cell recognition circuitry that reads battery data. An adapter doesn’t transmit that data, so the charger won’t recognise the battery. Always use your Milwaukee charger for charging, regardless of which tool the battery is mounted in.
Why would I want to do this instead of just buying Makita batteries?
You’re already invested in Milwaukee batteries and already own Milwaukee chargers. A single adapter costs £20–29 and lets you use Makita tools without purchasing an entirely new battery system and charger. If you’re buying just one or two Makita tools to fill a gap in your collection, an adapter is vastly cheaper than adopting a new platform. You’re borrowing compatibility, not adopting Makita as your main platform.
Internal Links
For a complete overview of the Milwaukee M18 platform, see our Milwaukee M18 Battery Compatibility guide. If you’re considering adopting Makita LXT as a second platform, read our Makita 18V LXT Battery Compatibility reference. For other cross-brand adapter options, see our main power tool battery adapter hub.
