DEWALT FlexVolt 9.0Ah Battery (DCB609) vs RYOBI ONE+ 18V Lithium-Ion Starter High Performance Kit with 2.0 Ah Battery, 4.0 Ah Battery, and Charger
Head-to-head spec comparison to help you pick the right battery for your needs.
Deciding between a genuine pack and a cheaper aftermarket one? Read our honest genuine vs aftermarket batteries guide.Read the guide →
Spec-by-Spec Comparison
| Spec | DEWALT FlexVolt 9.0Ah Battery (DCB609) | RYOBI ONE+ 18V Lithium-Ion Starter High Performance Kit with 2.0 Ah Battery, 4.0 Ah Battery, and Charger |
|---|---|---|
| Platform | FlexVolt | ONE+ 18V |
| Voltage | 20V/60V MAX | 18V |
| Capacity | 9 Ah | 0 Ah |
| Type | high-output | kit |
| Genuine OEM | Yes | Yes |
| Fuel Gauge | No | No |
| Warranty | 3 years | 3 years |
| Price | $152.49 | $97 |
| Rating | 8.7/10 | 8.6/10 |
| Buy on Amazon | Buy on Amazon |
Pros & Cons
DEWALT FlexVolt 9.0Ah Battery (DCB609)
Pros
- Genuine DEWALT FlexVolt pack backed by DEWALT's 3-year warranty
- FlexVolt design auto-switches between 20V and 60V MAX tools
- High capacity suited to demanding FlexVolt tools like table saws and mowers
Cons
- Premium price point relative to standard 20V MAX packs
- More capacity than needed for light-duty 20V MAX tools
- No fuel gauge readout mentioned for this pack
RYOBI ONE+ 18V Lithium-Ion Starter High Performance Kit with 2.0 Ah Battery, 4.0 Ah Battery, and Charger
Pros
- Includes two batteries — a compact 2.0Ah pack and a higher-capacity 4.0Ah pack — plus a charger, all genuine Ryobi
- Two different pack sizes cover both lightweight/compact use and longer-runtime use from one purchase
- Good value for a two-battery-plus-charger bundle at under $100
Cons
- Currently showing low stock on Amazon
- Because it bundles two different-capacity batteries, we don't collapse that into one capacity number — check the listing for the exact 2.0Ah/4.0Ah split
- We haven't run our own runtime tests; capacities are Ryobi's stated ratings
Our Verdicts
DEWALT FlexVolt 9.0Ah Battery (DCB609)
The DCB609 is DEWALT's genuine high-capacity FlexVolt pack — built for the cross-platform 20V/60V lineup, at a real premium over standard 20V MAX batteries.
RYOBI ONE+ 18V Lithium-Ion Starter High Performance Kit with 2.0 Ah Battery, 4.0 Ah Battery, and Charger
A genuine Ryobi kit that pairs a compact 2.0Ah pack with a higher-capacity 4.0Ah pack and one charger — solid value for ONE+ owners who want both a light pack and a runtime pack.
RYOBI ONE+ 18V Lithium-Ion Starter High Performance Kit with 2.0 Ah Battery, 4.0 Ah Battery, and Charger
$97
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