# Milwaukee M18 vs Ryobi 40V

> Milwaukee M18 and Ryobi 40V batteries don't swap: we have no source saying either pack runs the other's tools. Milwaukee M18: 13 battery packs (2–12 Ah) and 29 garden tools listed. Ryobi 40V: 9 battery packs (2–12 Ah) and 49 garden tools listed. Widest mower: 21 in against 21 in. Strongest blower: 650 CFM against 850 CFM. Widest string trimmer: 17 in against 17 in.

| | [Milwaukee M18](https://powertoolgrid.com/lines/milwaukee-m18/) | [Ryobi 40V](https://powertoolgrid.com/lines/ryobi-40v/) |
|---|---|---|
| Voltage on the label | 18 V | 40 V |
| Batteries | 13 packs, 2–12 Ah | 9 packs, 2–12 Ah |
| Garden tools listed | 29: 1 mower, 6 string trimmers, 6 leaf blowers, 7 hedge trimmers, 4 chainsaws, 2 pole saws, 1 power head, 2 other yard tools | 49: 10 lawn mowers, 7 string trimmers, 11 leaf blowers, 5 hedge trimmers, 8 chainsaws, 2 pole saws, 4 snow blowers, 2 other yard tools |
| Widest mower | 21 in (M18 FUEL 21 in Self-Propelled Dual Battery Mower) | 21 in (HP Brushless 21 in Self-Propelled Mower) |
| Strongest blower | 650 CFM (M18 FUEL Dual Battery Backpack Blower) | 850 CFM (HP Brushless 850 CFM Backpack Blower) |
| Widest string trimmer | 17 in (M18 FUEL 17 in Dual Battery String Trimmer) | 17 in (HP Brushless 17 in Attachment Capable String Trimmer) |
| Self-propelled mowers | 1 of 1 | 3 of 10 |
| Longest tool warranty | 3 years | 5 years |
| Where it's sold | Several stores | Only at The Home Depot |

Counts are what the catalogue lists so far, not each brand's whole range.

## Questions

**Do Milwaukee M18 batteries work with Ryobi 40V tools?**
No. We have no source saying a Milwaukee M18 battery runs Ryobi 40V tools, or the other way round, so owning both means two sets of packs and chargers.

**Which has more garden tools, Milwaukee M18 or Ryobi 40V?**
In this catalogue so far: 29 for Milwaukee M18 and 49 for Ryobi 40V. Both brands may make more than are listed yet.

**Which has the bigger battery, Milwaukee M18 or Ryobi 40V?**
By the brands' amp-hour figures, the largest Milwaukee M18 pack listed is 12 Ah and the largest Ryobi 40V pack is 12 Ah. Amp-hours only compare fairly at the same voltage (18 V against 40 V); watt-hours, where the brand states them, are on each battery's page.

**Which makes the wider mower, Milwaukee M18 or Ryobi 40V?**
By the brands' own figures: 21 in for Milwaukee M18 ([M18 FUEL 21 in Self-Propelled Dual Battery Mower](https://powertoolgrid.com/products/milwaukee-m18-2823-20/)) and 21 in for Ryobi 40V ([HP Brushless 21 in Self-Propelled Mower](https://powertoolgrid.com/products/ryobi-40v-hp-21in-sp/)).

**Which has the stronger leaf blower, Milwaukee M18 or Ryobi 40V?**
By the brands' own figures: 650 CFM for Milwaukee M18 ([M18 FUEL Dual Battery Backpack Blower](https://powertoolgrid.com/products/milwaukee-m18-3009-20/)) and 850 CFM for Ryobi 40V ([HP Brushless 850 CFM Backpack Blower](https://powertoolgrid.com/products/ryobi-40v-ry40hplb02b/)).

**Which has the wider string trimmer, Milwaukee M18 or Ryobi 40V?**
By the brands' own figures: 17 in for Milwaukee M18 ([M18 FUEL 17 in Dual Battery String Trimmer](https://powertoolgrid.com/products/milwaukee-m18-3006-20/)) and 17 in for Ryobi 40V ([HP Brushless 17 in Attachment Capable String Trimmer](https://powertoolgrid.com/products/ryobi-40v-hp-17in-trimmer/)).

**Which has the longer warranty, Milwaukee M18 or Ryobi 40V?**
The longest tool warranty we have read is 3 years for Milwaukee M18 and 5 years for Ryobi 40V. Batteries often carry a shorter one; check each product's page.

Full product lists with specs and sources: [Milwaukee M18](https://powertoolgrid.com/lines/milwaukee-m18/index.md), [Ryobi 40V](https://powertoolgrid.com/lines/ryobi-40v/index.md). Every platform side by side: https://powertoolgrid.com/platforms/. Page: https://powertoolgrid.com/vs/milwaukee-m18-vs-ryobi-40v/

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PowerToolGrid lists cordless yard-tool battery platforms from every brand side by side, with a source for every spec. [How we compare](https://powertoolgrid.com/how-we-compare/). Data as of 2026-10-29.