No, Makita 18V LXT batteries cannot be used directly in 40V XGT tools. The two battery platforms use completely different physical connections and voltages. However, Makita does offer an adapter that allows you to use LXT batteries in certain XGT tools. Here’s everything you need to know.
The Short Answer
Makita 18V LXT and 40V XGT batteries are not cross-compatible. They have different battery rail designs, different voltages, and different communication chips. You cannot physically insert an LXT battery into an XGT tool or vice versa — the connectors simply won’t fit.
Why Are They Incompatible?
Makita designed the 40V XGT platform as a step up from the 18V LXT system. The key differences are:
Voltage: LXT batteries operate at 18V nominal (20V max). XGT batteries operate at 40V nominal (40V max). Inserting a lower-voltage battery into a higher-voltage tool would not provide enough power, and the electronics are designed for different voltage ranges.
Physical design: The battery rail (the sliding mechanism that locks the battery into the tool) is completely different between the two systems. LXT uses a narrower rail, while XGT uses a wider rail with additional communication pins.
Smart communication: XGT batteries include a smart communication system that monitors temperature, charge state, and power draw in real time. LXT batteries don’t have this feature, so XGT tools wouldn’t receive the data they need to operate safely.
The Makita ADP10 Adapter — Using LXT Batteries in XGT Tools
Makita recognised that many tradespeople have large collections of 18V LXT batteries and released the ADP10 adapter (also sold as the 191C11-5). This adapter accepts two 18V LXT batteries and connects them in series to deliver 36V to XGT tools.
Important things to know about the ADP10:
It requires two LXT batteries — a single LXT battery won’t work. The two batteries are wired in series to produce 36V, which is close enough to the 40V XGT range for compatible tools to function.
It does not work with all XGT tools. High-power tools like the 40V XGT circular saw or rotary hammer may not support the adapter because they need the full 40V and the higher current delivery of genuine XGT batteries.
You will get reduced runtime and slightly less power compared to using a native XGT battery. Two 5.0Ah LXT batteries through the adapter will deliver less total energy than a single 40V XGT 4.0Ah battery.
The adapter adds weight and bulk to the tool. It’s a practical bridging solution, not a permanent replacement for XGT batteries.
Can You Use XGT Batteries in LXT Tools?
No. There is no adapter to use 40V XGT batteries in 18V LXT tools. The voltage difference would be dangerous — a 40V battery powering an 18V tool could damage the motor, electronics, or both, and could create a fire risk. Makita does not produce an XGT-to-LXT adapter and it’s unlikely they ever will.
What About the Makita CXT 12V Range?
Makita’s 12V CXT (slide-type) batteries are a third, separate platform. CXT batteries are not compatible with LXT or XGT tools, and no adapters exist for cross-use between CXT and the other platforms.
Which Platform Should You Buy Into?
If you’re starting fresh, the decision comes down to what tools you need. The 18V LXT range is Makita’s largest platform with over 300 tools available — it covers everything from drills and impact drivers to garden tools and vacuums. The 40V XGT platform is designed for high-power applications where 18V isn’t enough, such as large angle grinders, mitre saws, and demolition hammers.
Many professional users run both platforms, using LXT for lighter-duty tasks and XGT for tools that demand more power. The ADP10 adapter provides a useful bridge between the two during the transition.
Frequently Asked Questions
Can I put a Makita 18V battery in a 40V tool?
No, not directly. The batteries have different physical connectors. However, the Makita ADP10 adapter allows you to use two 18V LXT batteries together to power compatible 40V XGT tools.
Are Makita LXT and XGT batteries the same size?
No. XGT batteries are physically larger and use a wider rail system. They cannot be inserted into LXT tools, and LXT batteries cannot be inserted into XGT tools.
Does the ADP10 adapter work with all XGT tools?
No, it works with many but not all XGT tools. Some high-power tools require the full 40V and higher current delivery that only native XGT batteries can provide. Check the specific tool’s documentation or Makita’s compatibility list.
Will using the adapter void my Makita warranty?
No, the ADP10 is an official Makita product designed for this purpose. Using it with compatible tools will not void your warranty.
Can I charge LXT and XGT batteries on the same charger?
Standard chargers are platform-specific — LXT chargers only charge LXT batteries and XGT chargers only charge XGT batteries. However, Makita offers dual-port chargers like the DC40RB that can charge both LXT and XGT batteries.
