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Cordless angle grinders have caught up with corded ones. The best brushless models now match 1,500W to 2,800W mains grinders, and with no cable to trip on or cut through they are safer on site too.
The trap is the price tag. A "£120 grinder" is almost always a bare tool: no battery, no charger. A good 5.0Ah battery and charger can double the price. So when choosing the best cordless angle grinder, the real question is which battery platform you are buying into, because you will be buying drills, saws and sanders on it for years.
We have listed complete kits where they are good value, and bare tools where you are likely to own the batteries already. For brand-specific picks see our best Makita angle grinder and best DeWalt angle grinder guides.
At a glance: our top picks
- Best cordless angle grinder overall: DeWalt DCG405 18v XR Brushless 125mm (2 x 5.0Ah kit) – £331.95 at My Tool Shed
- Best value cordless kit: Einhell TP-AG 18/125 CE Q Li Brushless 125mm (2 x 5.2Ah kit) – £238.95 at My Tool Shed
- Most powerful 18v: Bosch Professional GWX 18V-15 P X-LOCK 125mm (bare) – £346.95 at My Tool Shed
- Best 40v: Makita GA041G 40v XGT X-LOCK 125mm (bare) – £229.99 at My Tool Shed
- Best for DIY: Bosch AdvancedGrind 18V-80 125mm (2 x 4.0Ah kit) – £211.95 at My Tool Shed
- Best big cordless: Milwaukee M18 FLAG230XPDB Fuel 230mm (bare) – £313.95 at My Tool Shed
How we chose
We compared every cordless grinder from our UK retail partners and ranked them on:
- Brushless motor: more power, longer runtime and nothing to wear out.
- Real kit cost: price including at least one 4.0Ah or larger battery and a charger.
- Safety electronics: brake, kickback clutch or AFT, soft start and restart protection.
- Platform size: how many other tools share the battery.
The best cordless angle grinders to buy in 2026
1. DeWalt DCG405 18v XR Brushless 125mm (2 x 5.0Ah kit)
- Disc size125mm
- Power18v brushless
- In the box2 x 5.0Ah, charger, TSTAK case
- SafetyE-clutch, brake under 2s, no-volt release
Pros
- DeWalt quotes 69 cuts through 1/2" rebar per 5.0Ah battery
- Electronic clutch reduces kickback if the disc pinches
- Complete kit, ready to go
Cons
- No variable speed
- Dearer than bare tools if you already own DeWalt batteries
Two 5.0Ah batteries, a charger and a case, with a brushless motor, electronic clutch and fast brake. DeWalt's 18v XR range is huge, so the batteries will run hundreds of other tools. It is the easiest recommendation for most people.
2. Einhell TP-AG 18/125 CE Q Li Brushless 125mm (2 x 5.2Ah kit)
- Disc size125mm
- Speed3,000 to 10,500rpm
- In the box2 x 5.2Ah, charger
- Cut depth33mm
Pros
- Constant speed electronics hold rpm under load
- Variable speed with LED display
- Tool-free Quick Fix nut
- 10 year motor warranty when registered
Cons
- No electronic brake
- Power X-Change is less common on trade sites
Einhell gives you variable speed, constant speed electronics and two 5.2Ah batteries for under £240. Power X-Change also runs Einhell's large garden tool range, which makes it a good home platform.
3. Bosch Professional GWX 18V-15 P X-LOCK 125mm (bare)
- Disc size125mm
- Power1,500W class Biturbo brushless
- SafetyKickBack Control, X-Brake, PROtection switch
- In the boxBare tool
Pros
- Corded-class power from 18v
- KickBack Control cuts the motor if the disc jams
- X-LOCK disc changes in seconds
Cons
- Battery and charger extra
- X-LOCK discs cost more
Bosch's Biturbo motor delivers corded-class power from 18v, and KickBack Control is one of the best safety systems available. A good choice if you are on Bosch Professional.
4. Makita GA041G 40v XGT X-LOCK 125mm (bare)
- Disc size125mm
- Speed3,000 to 8,500rpm
- Vibration3.4m/s²
- SafetyAFT, electric brake, anti-restart
Pros
- Very low vibration
- AFT shuts the motor down if the disc snags
- X-LOCK tool-free discs
Cons
- XGT batteries are expensive
- Slide switch, not paddle
Makita's XGT 40v range is built for heavy trade use. The GA041G has X-LOCK, variable speed and very low vibration. Batteries are expensive, but they charge fast and are tough.
5. Bosch AdvancedGrind 18V-80 125mm (2 x 4.0Ah kit)
- Disc size125mm
- Speed2,800 to 12,000rpm
- Weight1.7kg bare
- In the box2 x 4.0Ah, charger
Pros
- Widest speed range here, down to 2,800rpm
- Soft start and tool-free quick-change nut
- Power for All batteries fit 100+ tools
Cons
- DIY build, not trade
- No brake
Bosch's green range shares the Power for All battery with dozens of brands. The AdvancedGrind has a wide speed range and a tool-free nut, and the kit with two 4.0Ah batteries is great value.
6. Milwaukee M18 FLAG230XPDB Fuel 230mm (bare)
- Disc size230mm
- PowerSingle 18v battery
- Cut depth65mm
- SafetyDisc brake, paddle switch
Pros
- 230mm on one 18v battery
- Fixtec tool-free nut
- Anti-vibration side handle
Cons
- Needs High Output batteries to perform
- Bare tool
If you need a 230mm disc without a cable, Milwaukee's FLAG230 runs one on a single M18 battery. Use High Output packs for the best results.
How big a battery do you need?
| Battery | Good for |
|---|---|
| 2.0Ah | Quick cuts, bolts, light wire brushing. Runs flat fast. |
| 4.0Ah to 5.0Ah | Most metal cutting and grinding. The sweet spot. |
| 6.0Ah to 9.0Ah | Concrete, stone, 180mm and 230mm grinders. |
Grinders draw more current than almost any other cordless tool, so small batteries do not just run out, they can also cut out under load. Bigger and "high output" batteries deliver more power, not just longer runtime.
Choosing a battery platform
- DeWalt 18v XR / 54v Flexvolt: huge trade range. Flexvolt batteries also run 18v tools.
- Makita 18v LXT / 40v XGT: the widest 18v range. XGT is separate and aimed at heavy use.
- Bosch Professional 18v / Power for All (green): two separate systems, so check which one you have.
- Einhell Power X-Change: strong value, with big DIY and garden ranges.
- Milwaukee M18: strong trade following, especially for high-output tools.
Already own a drill?
Buy a bare grinder on the same platform. It is the single biggest saving you can make.
On a tight budget? Our best budget angle grinder guide lists the cheapest complete kits. Still unsure about going cordless? Our best corded angle grinder guide covers when a cable still makes sense.
Quick buying checklist
- Pick the battery platform first, then the grinder. It is the most expensive decision.
- Brushless motor. There is no good reason to buy brushed in 2026.
- Budget for a 5Ah battery or larger. 2Ah packs are fine for drills but not for grinders.
- Kickback protection: look for an electronic clutch, a kickback brake or AFT.
- Paddle switch if you work on site. It stops the tool when you let go.
Expert corner: what really limits a cordless grinder
A grinder is one of the hungriest cordless tools you can own. Three things decide how it performs:
- Current, not just capacity. A bigger battery has more cells working together, so it can deliver more current without overheating. That is why a grinder feels stronger on a 5Ah pack than on a 2Ah pack of the same voltage.
- Heat. Chargers will not charge a pack that is too hot. DeWalt calls this "hot/cold delay". Lithium batteries should not be charged below 0°C either, because it causes permanent damage called lithium plating. A battery left in a freezing van will feel weak and should warm up before charging.
- The disc. A thin 1mm cutting disc removes less metal per cut, so you get more cuts per charge than with a 1.6mm or 3mm disc.
Expert tips that save time and money
- Carry two batteries and rotate them. One cools while the other works. Owners say this does more for battery life than anything else.
- "20V max" and "18V" are usually the same battery. US brands quote the peak voltage and UK brands quote the nominal. Compare the platform, not the number.
- Check exactly what "kit" means. The model code tells you. See our DeWalt guide and Makita guide for how to decode the letters.
- Store batteries indoors in winter and part charged if you will not use them for a while.
- Need the most power without a cable? Compare 36V, 40V and 54V grinders in our most powerful angle grinder guide.
What owners actually say
These points come from UK trade and hobby forums. We have linked each thread so you can read the full discussion.
- On the Sawmill Creek forum, owners report their chargers "delay charging if the battery is too hot", across DeWalt, Bosch and Milwaukee. The advice is to "let them cool down" to "prolong the life of the battery". (Sawmill Creek: let batteries cool before charging)
- MIG Welding Forum members choosing between cordless sizes note that 115mm and 125mm models are often "exactly the same body except the guards are different". (MIG Welding Forum: 115 or 125mm cordless grinder)
Beginner mistakes to avoid
We see these again and again
- Buying a cheap kit with 2Ah batteries and blaming the grinder for lacking power.
- Charging a pack straight off the grinder while it is still hot.
- Charging batteries in a freezing van or shed.
- Buying into a new platform when you already own batteries from another brand.
Read the disc before you fit it
Every resin-bonded cutting or grinding disc sold in the UK carries markings under EN 12413. Two matter most:
- The use-by date is stamped on the metal centre ring as a "V" followed by the date, for example V12/2027. It is set no more than three years after manufacture. Out-of-date resin bonds can break up at speed.
- The maximum rpm must be equal to or higher than your grinder's no-load speed.
A disc's limit is really its rim speed, usually 80 metres per second. That is why bigger discs are rated for lower rpm: 80 m/s works out at about 13,300rpm for a 115mm disc, 12,200rpm for 125mm, 8,500rpm for 180mm and 6,600rpm for 230mm. Never fit a worn-down 230mm disc to a small grinder. It is still only rated for about 6,600rpm, and a 125mm grinder spins nearly twice that fast.
Sources: Sawmill Creek: let batteries cool before charging · Battery University: charging at high and low temperatures · MIG Welding Forum: 115 or 125mm cordless grinder · HSE HSG17: Safety in the use of abrasive wheels · Abrasive wheel marking explained (EN 12413)
Frequently asked questions
Are cordless angle grinders as powerful as corded?
The best ones are. The DeWalt DCG460 and Makita GA050G are rated at 2,300W to 2,800W. Budget 18v grinders are closer to 700W to 900W corded models.
Is brushless worth it on a grinder?
Yes. Brushless motors run longer per charge, give more power and have no brushes to wear out.
What battery size is best for a cordless grinder?
At least 4.0Ah, ideally 5.0Ah. Use 6.0Ah or more for concrete and large discs.
Can I use any battery in my grinder?
Only batteries from the same platform. Bosch Professional and Bosch green, for example, are not interchangeable.
Why won't my battery charge after using the grinder?
It is probably too hot. Most chargers pause until the pack cools to a safe temperature, then charge normally.
Can I charge tool batteries in the cold?
Not below 0°C. Charging lithium batteries when frozen causes permanent damage. Bring them indoors to warm up first.
What is a brushless motor?
A motor that uses electronics instead of carbon brushes to switch the power. It runs cooler, gets more work from each charge and has nothing to wear out.
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