A cordless leaf blower is only as practical as its battery allows. Unlike saws or drills, where you control the load and pace, a blower often runs at or near full speed for long stretches to shift leaves, debris and dust, so battery capacity matters a lot.
Choosing the right battery for your cordless blower is straightforward: you need more capacity than you might expect. We suggest 5.0Ah as a minimum for regular work, and 6.0Ah if you’re clearing larger gardens or working regularly. The three major platforms—Makita 18V LXT, DeWalt 20V MAX, and Milwaukee M18—all sell blowers that run on the same batteries as their other tools.
In this guide, we compare all nine batteries, suggest which capacity suits different garden sizes, and explain why carrying a spare battery often makes more sense than buying a smaller one.
Quick Recommendations
| Use Case | Makita 18V LXT | DeWalt 20V MAX | Milwaukee M18 |
|---|---|---|---|
| Best all-round | BL1850B 5.0Ah | DCB205 5.0Ah | 48-11-1850 5.0Ah |
| Best for heavy use | BL1860B 6.0Ah | DCB206 6.0Ah | 48-11-1860 6.0Ah |
| Smaller pack | BL1830 3.0Ah | DCB204 4.0Ah | 48-11-1840 4.0Ah |
Starter packs by platform
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Before you buy: check that the size, fitting/bore and maximum-rated speed marked on the accessory match what your tool’s manual specifies. We have not physically tested these products; listings are compiled from published specifications. These are affiliate links.
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Which batteries fit which tools — cross-brand, adapters & Ah, decoded.
Why Battery Choice Matters for Leaf Blowers
Blowers are among the heavier-drawing cordless tools: they often run at or near full speed with little idle time, so they can empty a pack faster than stop-start tools such as drills. Your feel for battery capacity from other tools may not carry over.
The makers do not publish blowing runtimes for these battery and blower pairs, and we have not tested them, so we do not estimate them. As a rule of thumb, a 6.0Ah pack has a fifth more capacity than a 5.0Ah pack, and a 3.0–4.0Ah pack suits small properties, patio clean-up or touch-up work.
Weight also matters with blowers, because you hold one for the whole job, and a heavier battery can shift the balance and add fatigue. Before choosing a bigger pack, check the weight: Makita UK lists the 6.0Ah BL1860B only 30 g heavier than the 5.0Ah BL1850B (0.66 kg vs 0.63 kg), while DeWalt US lists the 6.0Ah DCB206 about 0.3 kg heavier than the 5.0Ah DCB205 (2.25 lb vs 1.54 lb). Carrying a spare 5.0Ah pack is often the better strategy.
Best Batteries for Makita Leaf Blowers
Best All-Round: Makita BL1850B 5.0Ah
The BL1850B is the practical choice for regular garden work on Makita LXT blowers such as the DUB185 or DUB186Z (Makita UK lists the BL1830B to BL1860B as compatible with the DUB186). Makita does not publish a runtime for these pairs, and we have not tested one. Because the same Makita 18V LXT battery powers over 325 Makita tools, it’s not a single-use purchase.
Model: BL1850B | Capacity: 5.0Ah | Weight: 0.63 kg (Makita UK)
Best for Heavy Use: Makita BL1860B 6.0Ah
The BL1860B is our pick for longer blowing sessions or larger properties. Makita UK lists it at 0.66 kg, only 30 g more than the BL1850B, so the extra capacity costs little in weight.
Model: BL1860B | Capacity: 6.0Ah | Weight: 0.66 kg (Makita UK)
Smaller Pack: Makita BL1830 3.0Ah
The BL1830 is a 3.0Ah pack for occasional clearing and small patios. Note that it saves little weight: Makita UK lists the BL1830B at 0.64 kg, about the same as the 5.0Ah BL1850B (0.63 kg), so for most people a 5.0Ah pack is the better buy.
Model: BL1830 | Capacity: 3.0Ah | Weight: 0.64 kg (BL1830B, Makita UK)
For full specifications and all compatible Makita 18V LXT garden and power tools, visit our Makita 18V LXT Battery Compatibility page.
Best Batteries for DeWalt Leaf Blowers
Best All-Round: DeWalt DCB205 5.0Ah
The DCB205 is DeWalt’s 5.0Ah 20V MAX pack (US part number; DeWalt’s UK 5.0Ah 18V XR pack is the DCB184) and a sensible match for blowers like the US DCBL722B. DeWalt does not publish a runtime for this pair, and we have not tested one. It’s the sensible starting point for anyone committed to the DeWalt platform.
Model: DCB205 | Capacity: 5.0Ah | Weight: 0.70 kg (1.54 lb, DEWALT US)
Best for Heavy Use: DeWalt DCB206 6.0Ah
The DCB206 is DeWalt’s 6.0Ah 20V MAX pack and our pick for larger properties or frequent use. Note that DeWalt US lists it at 2.25 lb (about 1.02 kg), against 1.54 lb for the DCB205.
Model: DCB206 | Capacity: 6.0Ah | Weight: 1.02 kg (2.25 lb, DEWALT US)
Best Lightweight: DeWalt DCB204 4.0Ah
The DCB204 at 4.0Ah is lighter than the 5.0Ah DCB205 (DeWalt US: 1.4 lb vs 1.54 lb) but needs swapping sooner. It’s a reasonable choice if you mix blowing with other 20V MAX tasks, or if you keep a spare charged on-site.
Model: DCB204 | Capacity: 4.0Ah | Weight: 0.64 kg (1.4 lb, DEWALT US)
See our complete DeWalt 20V MAX Battery Compatibility guide for full tool specifications and battery matching.
Best Batteries for Milwaukee Leaf Blowers
Best All-Round: Milwaukee 48-11-1850 5.0Ah
The 48-11-1850 is Milwaukee’s US M18 REDLITHIUM XC5.0 pack (Milwaukee’s UK 5.0Ah M18 pack is the M18 B5), for blowers like the M18 BBL or M18 FBLG3. Milwaukee does not publish a runtime for these pairs, and we have not tested one. This is the safe choice for regular garden work.
Buy Milwaukee 48-11-1850 on Amazon
Model: 48-11-1850 | Capacity: 5.0Ah | Weight: Not stated in our Milwaukee sources (Milwaukee UK lists the 5.0Ah M18 B5 at 0.7 kg)
Best for Heavy Use: Milwaukee 48-11-1860 6.0Ah
The 48-11-1860 is Milwaukee’s US M18 REDLITHIUM XC6.0 extended-capacity pack. If you’re managing larger properties or back-to-back jobs, it means fewer stops to swap or charge.
Buy Milwaukee 48-11-1860 on Amazon
Model: 48-11-1860 | Capacity: 6.0Ah | Weight: Not stated in our Milwaukee sources
Smaller Pack: Milwaukee 48-11-1840 4.0Ah
The 48-11-1840 is Milwaukee’s US M18 REDLITHIUM XC 4.0 pack. Capacity is the limiting factor, and it may not save much weight: Milwaukee UK lists its 4.0Ah and 5.0Ah M18 packs (M18 B4, M18 B5) at the same 0.7 kg. Choose it if you already own one or rotate spare batteries.
Buy Milwaukee 48-11-1840 on Amazon
Model: 48-11-1840 | Capacity: 4.0Ah | Weight: Not stated in our Milwaukee sources (Milwaukee UK lists the 4.0Ah M18 B4 at 0.7 kg)
For comprehensive compatibility information across all Milwaukee M18 tools and batteries, visit our Milwaukee M18 Battery Compatibility page.
Full Battery Comparison Table
| Battery | Platform | Capacity | Best For | Buy |
|---|---|---|---|---|
| Makita BL1850B | 18V LXT | 5.0Ah | Regular garden blowing | Amazon |
| Makita BL1860B | 18V LXT | 6.0Ah | Extended blowing, larger gardens | Amazon |
| Makita BL1830 | 18V LXT | 3.0Ah | Light duty, occasional use | Amazon |
| DeWalt DCB205 | 20V MAX | 5.0Ah | Regular garden blowing | Amazon |
| DeWalt DCB206 | 20V MAX | 6.0Ah | Extended blowing, larger gardens | Amazon |
| DeWalt DCB204 | 20V MAX | 4.0Ah | Lighter duty, mixed-task work | Amazon |
| Milwaukee 48-11-1850 | M18 | 5.0Ah | Regular garden blowing | Amazon |
| Milwaukee 48-11-1860 | M18 | 6.0Ah | Extended blowing, all-day jobs | Amazon |
| Milwaukee 48-11-1840 | M18 | 4.0Ah | Light duty, mixed-task work | Amazon |
Watch: Video Guide
Frequently Asked Questions
How long does a 5.0Ah battery last in a cordless leaf blower?
The makers do not publish blowing runtimes for these battery and blower pairs, and we have not tested them, so we do not estimate them. Runtime depends heavily on the blower model and the speed setting you use; a larger pack, or a spare, gives you more blowing time.
What’s the minimum battery size for practical blowing work?
We suggest 5.0Ah as a practical minimum for regular garden work. Smaller packs fit but need swapping sooner, so they suit small patios or touch-up work. If you’re buying a blower, budget for at least a 5.0Ah battery.
Is it better to buy a 6.0Ah battery or two 5.0Ah batteries?
It depends on your routine. If you’re comfortable swapping, two 5.0Ah batteries give more flexibility (10Ah in total versus 6Ah). If you want fewer stops, a single 6.0Ah pack helps, though it may weigh more. Prices vary, so compare current prices.
Can I use an 18V blower at 36V (two batteries in series)?
Not with an 18V blower: an 18V LXT or M18 blower takes one 18V pack, and you should only use the batteries listed in its manual. Makita also sells 18V X2 blowers, such as the DUB362, which take two 18V LXT batteries to run at 36V.
Why does my blower drain batteries faster than my drill?
Blowers tend to run near full speed for long stretches, whereas a drill works in short bursts, so a blower can empty a pack faster. We have not measured how much faster, and the makers do not publish a comparison.
How can I extend leaf blower runtime between charges?
Carry a spare charged battery so you can swap without waiting for the charger. Use a lower speed setting when full power is not needed, and avoid working in strong wind. Check your blower’s manual for any intake screen that needs keeping clear.
How we compile this guide
We cross-reference compatibility details against manufacturer specifications where available, official tool manuals, and the physical standards that govern fitment (bore sizes, arbor diameters, voltage platforms, connector types). We prioritise primary sources over retailer listings, flag anything we can’t confirm, and re-verify the data on a regular cycle. Where we give a buying recommendation, we tell you the reasoning — not just the link. More on our method →
