No. Makita, DeWalt, and Milwaukee batteries are not interchangeable between brands. Each manufacturer uses proprietary battery designs with different physical connectors, voltages, and communication systems. There is no official way to use one brand’s batteries in another brand’s tools.
The Short Answer
Power tool batteries are brand-specific. A Makita 18V LXT battery will not physically fit a DeWalt 20V MAX tool, and a Milwaukee M18 battery cannot be inserted into a Makita tool. The rail designs, pin layouts, and electronic communication protocols are completely different between manufacturers.
Why Aren’t Power Tool Batteries Universal?
Proprietary connectors: Each brand designs its own battery slide rail and locking mechanism. Makita uses a narrow rail with a front-slide design, DeWalt uses a wider rail, and Milwaukee uses its own unique slide-on configuration. They are not physically compatible.
Different voltage naming: While Makita, DeWalt, and Milwaukee all have 18V-class battery platforms, they label them differently. DeWalt calls theirs “20V MAX” (which is the unloaded maximum voltage of a fully charged 18V lithium-ion pack). Makita labels theirs “18V LXT” (nominal voltage). Milwaukee uses “M18.” Despite the different labels, the actual cell voltages are nearly identical — but the tools and batteries are still mechanically incompatible.
Smart communication chips: Modern cordless tools use electronic communication between the battery and tool to monitor temperature, current draw, and cell health. Each brand uses its own proprietary protocol. Even if you could physically connect a Makita battery to a DeWalt tool, the electronics wouldn’t communicate properly, and safety features wouldn’t function.
What About Third-Party Adapters?
You’ll find third-party cross-brand adapters for sale online — for example, adapters claiming to let you use Makita batteries in DeWalt tools, or Milwaukee batteries in Ryobi tools. We strongly recommend against using these. Here’s why:
Safety risk: Without proper electronic communication between the battery and tool, overheating protection and overcurrent safeguards are bypassed. This increases the risk of thermal runaway, which can cause fires.
Warranty void: Using a third-party adapter with non-approved batteries will void the warranties on both your tool and your battery. If something goes wrong, the manufacturer won’t cover the damage.
Potential tool damage: Subtle voltage differences, power delivery characteristics, and missing communication signals can damage motors, switch assemblies, and circuit boards over time — even if the tool appears to work initially.
Brand-by-Brand Battery Platform Summary
Makita runs three main platforms: 12V CXT, 18V LXT (their largest range with 300+ tools), and 40V XGT. LXT and XGT are not cross-compatible, though the ADP10 adapter lets you use two LXT batteries in some XGT tools.
DeWalt runs 12V MAX, 20V MAX, and FLEXVOLT (60V/120V). FLEXVOLT batteries are backwards compatible with 20V MAX tools, but not the other way around.
Milwaukee runs M12 (12V), M18 (18V), and MX FUEL (high-voltage). M12 and M18 are completely separate platforms with no cross-compatibility.
Other major brands like Bosch (18V/PROFACTOR), Hikoki (MultiVolt 36V/18V), and Metabo HPT (MultiVolt) each have their own proprietary systems. None are compatible across brands.
The Exception: Multi-Brand Battery Systems
There is one notable cross-brand initiative: the CAS (Cordless Alliance System), which is a partnership between Metabo and several other European manufacturers (including Mafell, Eisenblatter, Eibenstock, Collomix, and others). CAS-compatible tools all share the same 18V battery interface, allowing genuine cross-brand battery use. However, none of the “big three” (Makita, DeWalt, Milwaukee) participate in CAS.
Frequently Asked Questions
Can I use Makita batteries in DeWalt tools?
No. Makita and DeWalt use completely different battery designs. The physical connectors don’t match, and the electronic communication systems are incompatible. There is no official adapter for cross-brand use.
Can I use Milwaukee batteries in Makita tools?
No. Milwaukee M18 and Makita 18V LXT batteries have different rail designs and pin layouts. They cannot be physically connected to each other’s tools.
Are DeWalt 20V and Milwaukee M18 the same voltage?
Essentially yes — both use 18V nominal lithium-ion cells. DeWalt markets theirs as “20V MAX” (the peak unloaded voltage), while Milwaukee calls theirs “M18” (nominal voltage). Despite the similar actual voltage, the batteries are mechanically incompatible.
Are third-party cross-brand adapters safe?
We don’t recommend them. Third-party adapters bypass safety communication between the battery and tool, increasing the risk of overheating, fire, and tool damage. They also void manufacturer warranties on both tools and batteries.
Will power tool batteries ever be universal?
It’s unlikely in the near future. Battery platforms are a core part of each manufacturer’s business model — once you buy into a brand’s battery system, you’re incentivised to keep buying their tools. The CAS alliance is the closest thing to a universal standard, but the major brands have not joined.
