DEWALT 12V MAX 2.0Ah Battery (DCB122) vs Milwaukee M18 REDLITHIUM 5.0Ah Battery (48-11-1850)
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 12V MAX 2.0Ah Battery (DCB122) | Milwaukee M18 REDLITHIUM 5.0Ah Battery (48-11-1850) |
|---|---|---|
| Platform | 12V MAX | M18 |
| Voltage | 12V MAX | 18V |
| Capacity | 2 Ah | 5 Ah |
| Type | compact | high-output |
| Genuine OEM | Yes | Yes |
| Fuel Gauge | No | No |
| Warranty | 3 years | 5 years |
| Price | $34.9 | $67.99 |
| Rating | 8.3/10 | 8.8/10 |
| Buy on Amazon | Buy on Amazon |
Pros & Cons
DEWALT 12V MAX 2.0Ah Battery (DCB122)
Pros
- Genuine DEWALT pack backed by DEWALT's 3-year warranty
- Compact 2.0Ah size fits DEWALT's 12V MAX lineup of light-duty tools
- Lowest price point of any genuine pack in this lineup
Cons
- Only compatible with 12V MAX tools, not 20V MAX or FlexVolt
- Limited runtime for anything beyond light-duty use
- No fuel gauge on this pack
Milwaukee M18 REDLITHIUM 5.0Ah Battery (48-11-1850)
Pros
- Genuine Milwaukee M18 pack backed by Milwaukee's 5-year warranty
- Drops straight into any M18 tool — no adapters, no guesswork
- 5.0Ah capacity gives solid runtime for daily-use M18 tools
- REDLITHIUM cell design is Milwaukee's own in-house spec
Cons
- No onboard fuel gauge — can't check remaining charge at a glance
- Costs more than aftermarket M18-compatible packs
- Only fits the M18 platform, not M12 or other brands
Our Verdicts
DEWALT 12V MAX 2.0Ah Battery (DCB122)
The DCB122 is the genuine, budget-friendly entry point for DEWALT's 12V MAX platform — right-sized for compact tools, not a fit for the 20V MAX lineup.
Milwaukee M18 REDLITHIUM 5.0Ah Battery (48-11-1850)
A genuine Milwaukee M18 pack is the safe first buy for anyone standardized on the M18 platform — real Milwaukee chemistry and the full manufacturer warranty, not a third-party guess.
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