DEWALT FlexVolt 9.0Ah Battery (DCB609) vs RYOBI ONE+ 18V 4.0Ah Battery with LED Fuel Gauge (PBP005)
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 4.0Ah Battery with LED Fuel Gauge (PBP005) |
|---|---|---|
| Platform | FlexVolt | ONE+ 18V |
| Voltage | 20V/60V MAX | 18V |
| Capacity | 9 Ah | 4 Ah |
| Type | high-output | high-output |
| Genuine OEM | Yes | Yes |
| Fuel Gauge | No | Yes |
| Warranty | 3 years | 3 years |
| Price | $152.49 | $54.99 |
| Rating | 8.7/10 | 8.5/10 |
| 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 4.0Ah Battery with LED Fuel Gauge (PBP005)
Pros
- Genuine RYOBI ONE+ pack backed by RYOBI's 3-year warranty
- LED fuel gauge shows remaining charge at a glance
- 4.0Ah capacity gives meaningfully more runtime than RYOBI's 1.5Ah packs
- Fits the entire ONE+ 18V tool ecosystem
Cons
- Costs more than RYOBI's smaller 1.5Ah or 2.0Ah packs
- ONE+ platform tools tend to be lighter-duty than pro-grade brands
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 4.0Ah Battery with LED Fuel Gauge (PBP005)
This genuine ONE+ 18V pack pairs real runtime with a built-in fuel gauge — a straightforward upgrade for anyone already in the RYOBI ONE+ ecosystem.
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