Once your work moves past drilling and driving into serious cutting, breaking, coring and chopping, an 18V tool starts to feel like it’s working too hard. That’s the gap DeWalt’s FlexVolt and Makita’s XGT are built to fill — high-voltage cordless platforms that take on jobs that used to mean a transformer, a generator or a corded saw on a lead. They get there in completely different ways, and choosing between them shapes which batteries, chargers and tools you’ll be buying for the next decade.
This is a comparison for UK tradespeople doing genuinely demanding work — groundworkers, formwork carpenters, kitchen fitters running big track saws, anyone reaching for a 9in grinder, an SDS-max breaker or a 305mm mitre saw on battery. Here’s exactly how the two platforms differ, what each does best, and how to decide which one to commit to in 2026.
Quick verdict
Buy into DeWalt FlexVolt if you already run 18V XR tools or want one battery system that does everything. The killer feature is backwards compatibility: a FlexVolt battery automatically switches between 54V for the big tools and 18V for your existing XR kit, so you’re not maintaining two separate ranges. For a mixed trade who wants high power without abandoning their 18V investment, that flexibility is hard to beat.
Buy into Makita XGT if outright performance and charge speed on the heaviest tools matter more than cross-compatibility. XGT is a clean-sheet 40V Max system — its own batteries, chargers and tools, fully separate from 18V LXT — engineered specifically for high-demand applications, with rapid charging and a tool range that pushes into proper corded-replacement territory. It’s the platform for someone building a heavy-duty kit from a strong base.
If you already own a big LXT collection, also read our Makita LXT vs XGT comparison before committing — for some trades, staying on twin-18V LXT is still the smarter money.
Specs and platform at a glance
| DeWalt FlexVolt | Makita XGT | |
| Headline voltage | 54V max (also runs as 18V) | 40V max |
| Nominal voltage | 54V / 18V auto-switching | 36V |
| Cross-compatibility | FlexVolt runs 18V XR tools too | Separate from 18V LXT (no cross-use) |
| Battery example | 54V 2.0Ah (=18V 6.0Ah), up to 54V 6.0Ah+ | 40V 2.5Ah, 4.0Ah, 8.0Ah+ |
| Charging | Fast, but generally slower than XGT | Very fast rapid charging |
| Best for | Mixed 18V + high-power kit | Dedicated heavy-duty cordless kit |
| Tool range | Broad, integrated with 18V XR | Growing, heavy-duty focused |
| UK retailers | Screwfix, Toolstation, ITS, Amazon UK | ITS, Screwfix, specialist, Amazon UK |
Voltage marketing makes this look closer than it is — DeWalt quotes 54V ‘max’ (around 18 cells) and Makita quotes 40V ‘max’ (around 10 cells), but both land in similar real-world power territory. Prices vary by kit and battery size, so check Screwfix, Toolstation and ITS for the live figure on the day; body-only tools are far cheaper if you’re buying into batteries anyway.
What DeWalt FlexVolt is really like
FlexVolt’s whole identity is the auto-switching battery. Drop a FlexVolt pack into a 54V tool and it delivers high voltage; drop it into an 18V XR tool and it reconfigures its cells to run as an 18V battery — usually a high-capacity one. For a tradesperson already invested in DeWalt’s enormous 18V XR range, that means the big-ticket FlexVolt purchases (table saw, mitre saw, breaker, 9in grinder) come with batteries that also top up and power your existing drills, impacts and lights. One charger, one ecosystem.
That flexibility is genuinely useful on a mixed site. You can carry fewer battery types, share packs across light and heavy tools, and grow the kit without stranding what you already own. FlexVolt tools like the 54V table saw, the flexvolt-advantage circular saws and the SDS-max breakers have earned a solid reputation for getting corded jobs done off battery.
The trade-offs are physical and financial. FlexVolt batteries are bigger and heavier than standard 18V packs because they carry more cells — fine on a table saw, more noticeable on a hand tool. They cost more, and charging the larger packs takes time. And while the range is broad, in the very heaviest applications some users feel XGT edges it on sustained grunt and recovery between cuts.
What Makita XGT is really like
XGT was Makita’s decision to stop stretching 18V and start again for high-demand work. It’s a 40V Max system with its own battery and charger architecture, designed from the ground up for tools that punish a platform — rotary hammers, big grinders, chainsaws, mitre saws, breakers and outdoor power equipment. Crucially, it is not compatible with 18V LXT: different battery, different charger, no cross-use. That’s deliberate — XGT isn’t trying to be backwards-compatible, it’s trying to be the best heavy platform Makita can build.
Where XGT shines is performance and charging. The packs deliver strong sustained power on demanding tools, and Makita’s rapid chargers turn packs around quickly — often noticeably faster than equivalent FlexVolt charging — which matters when a tool is your bottleneck on site. Communication between battery, tool and charger manages heat and longevity, and the heavy-duty tool range has filled out a lot since launch.
The catch is exactly that lack of compatibility. If you own a deep LXT collection, XGT is a second, separate system to buy into and carry — separate batteries, separate chargers, no sharing. For a tradesperson starting fresh on heavy work that’s no problem; for someone with a van full of 18V LXT it’s a real consideration, and twin-18V LXT tools may cover a lot of the same ground.
Batteries, chargers and the real running cost
This is where the platforms diverge most. FlexVolt’s pitch is fewer battery types across your whole kit — buy big FlexVolt packs and they serve both your 54V and 18V tools. XGT’s pitch is best-in-class packs for heavy tools, accepting that they live separately from your 18V LXT. Neither is wrong; they suit different starting points. If you’re a one-system-for-everything tradesperson, FlexVolt’s maths is appealing. If you want the strongest heavy kit and don’t mind two systems, XGT’s batteries and rapid charging deliver.
Either way, batteries are the real cost of going cordless heavy-duty — the high-capacity packs cost more than the bare tools. Buy body-only where you can, standardise on one or two battery sizes, and factor several spare packs and a multi-bay charger into the budget from the start.
Which should you buy?
Buy DeWalt FlexVolt if…
You already run DeWalt 18V XR, or you want a single battery system that powers everything from your impact driver to a 54V table saw. The auto-switching battery means you grow into high-power tools without stranding your existing kit — ideal for a mixed trade, a small firm standardising on one brand, or anyone who values one charger and one ecosystem over outright top-end performance.
Buy Makita XGT if…
Your work is genuinely heavy and you want the strongest cordless performance and the fastest charging on the big tools — breakers, large grinders, rotary hammers, chainsaws and mitre saws. XGT makes most sense if you’re building a heavy-duty kit fresh, or you’re happy to run it as a dedicated high-power system alongside (not sharing with) your 18V tools.
Consider staying on twin-18V if…
You own a large 18V collection (XR or LXT) and your heavy use is occasional. Many big tools now run off two 18V batteries and may cover your needs without committing to a whole new platform. Work out how often you actually reach for corded-replacement power before you buy into 54V or 40V.
Frequently asked questions
Is DeWalt FlexVolt or Makita XGT more powerful?
In real-world use they land in similar territory despite the 54V vs 40V badges — both quote ‘max’ voltages measured differently. On the very heaviest, most sustained applications some users give XGT the edge for grunt and recovery, while FlexVolt’s strength is delivering high power and 18V compatibility from one battery. For most trades the practical difference is smaller than the marketing suggests.
Can a FlexVolt battery run my 18V DeWalt tools?
Yes — that’s the whole point of FlexVolt. The battery automatically reconfigures to run as an 18V pack in DeWalt 18V XR tools, and as 54V in FlexVolt tools. That backwards compatibility is FlexVolt’s biggest advantage for anyone already invested in DeWalt 18V.
Is Makita XGT compatible with 18V LXT?
No. XGT is a completely separate 40V Max system with its own batteries and chargers — there’s no cross-compatibility with 18V LXT in either direction. If you own a lot of LXT, factor in that XGT is a second system to buy and carry, not an upgrade to your existing batteries.
Which charges faster, FlexVolt or XGT?
Makita XGT is generally the faster-charging system, with rapid chargers turning packs around quickly — an advantage when a tool is your bottleneck on site. FlexVolt charges acceptably but the larger high-capacity packs take longer. If quick turnaround matters more than battery sharing, that’s a point for XGT.
Should I switch platforms if I already own one brand?
Usually not. The cost of cordless lives in the batteries, so switching brands means re-buying packs and chargers as well as tools. Unless you have a specific need the other platform meets and your current one can’t, it’s almost always cheaper to stay put and buy the high-voltage tools within the system you already own.
Where can I buy DeWalt FlexVolt and Makita XGT in the UK?
Both are widely stocked in 2026. DeWalt FlexVolt — Screwfix, Toolstation, ITS, D&M Tools and Amazon UK. Makita XGT — ITS, Screwfix, specialist Makita stockists and Amazon UK. Buy body-only tools and standardise your battery sizes to keep the cost of going high-voltage under control.
Final word
FlexVolt and XGT are both excellent — they just answer different questions. FlexVolt wins on flexibility: one battery that powers your 18V kit and your 54V heavy tools, ideal if you’re already on DeWalt or want a single system for everything. XGT wins on dedicated heavy performance and charge speed, ideal if you’re building a serious high-power kit and don’t need it to talk to your 18V tools. Decide which of those two priorities describes your work, commit to one platform’s batteries, and don’t split your spend across both.
