DEWALT FlexVolt 9.0Ah Battery (DCB609) vs Milwaukee 48-59-1808 M12 and M18 12V/18V Lithium-Ion Multi-Voltage Rapid Battery Charger
Head-to-head spec comparison to help you pick the right battery for your needs.
Verdict
It's a Tie
The DEWALT FlexVolt 9.0Ah Battery (DCB609) and Milwaukee 48-59-1808 M12 and M18 12V/18V Lithium-Ion Multi-Voltage Rapid Battery Charger are evenly matched — your choice depends on which features matter most to you.
Spec-by-Spec Comparison
| Spec | DEWALT FlexVolt 9.0Ah Battery (DCB609) | Milwaukee 48-59-1808 M12 and M18 12V/18V Lithium-Ion Multi-Voltage Rapid Battery Charger |
|---|---|---|
| Platform | FlexVolt | M18 |
| Voltage | 20V/60V MAX | 18V |
| Capacity | 9 Ah | 0 Ah |
| Type | high-output | charger |
| Genuine OEM | Yes | Yes |
| Fuel Gauge | No | No |
| Warranty | 3 years | 5 years |
| Price | $152.49 | $54.89 |
| 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
Milwaukee 48-59-1808 M12 and M18 12V/18V Lithium-Ion Multi-Voltage Rapid Battery Charger
Pros
- Charges both M12 and M18 REDLITHIUM packs from one charger, useful if you own tools on both platforms
- Genuine Milwaukee OEM part, not a third-party clone
- Priced under $60, cheaper than buying a dedicated charger for each platform
- Compact footprint for a toolbox or job box
Cons
- Listed as non-retail/bulk packaging — no retail box or included manual
- Manufacturer listing doesn't state charge time or amperage, so we can't quote a speed
- Amazon listing shows check-availability status rather than guaranteed in-stock
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.
Milwaukee 48-59-1808 M12 and M18 12V/18V Lithium-Ion Multi-Voltage Rapid Battery Charger
If you run both M12 and M18 tools, one charger that handles both packs is a real convenience — this is a genuine Milwaukee part at a fair price, though stock availability varies.
Milwaukee 48-59-1808 M12 and M18 12V/18V Lithium-Ion Multi-Voltage Rapid Battery Charger
$54.89