DEWALT 12V MAX 2.0Ah Battery (DCB122) vs DEWALT 20V MAX 5Ah Lithium-Ion Battery and Charger Kit with Bag (DCB205CK)
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 Winner
DEWALT 20V MAX 5Ah Lithium-Ion Battery and Charger Kit with Bag (DCB205CK)
Wins on 2 of 3 spec categories
Spec-by-Spec Comparison
| Spec | DEWALT 12V MAX 2.0Ah Battery (DCB122) | DEWALT 20V MAX 5Ah Lithium-Ion Battery and Charger Kit with Bag (DCB205CK) |
|---|---|---|
| Platform | 12V MAX | 20V MAX |
| Voltage | 12V MAX | 20V MAX |
| Capacity | 2 Ah | 5 Ah |
| Type | compact | kit |
| Genuine OEM | Yes | Yes |
| Fuel Gauge | No | No |
| Warranty | 3 years | 3 years |
| Price | $34.9 | $123 |
| Rating | 8.3/10 | 8.9/10 |
| 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
DEWALT 20V MAX 5Ah Lithium-Ion Battery and Charger Kit with Bag (DCB205CK)
Pros
- Bundles a 5Ah 20V MAX battery, charger, and a carry bag in one genuine DeWalt kit
- 5Ah capacity is well above DeWalt's base 1.3Ah/1.5Ah starter packs for longer runtime
- Currently in stock on Amazon
- Genuine DeWalt OEM kit
Cons
- Only one battery included — no second pack for swapping mid-job
- 5Ah packs add noticeable weight versus compact packs
- We haven't independently measured runtime; 5Ah is DeWalt's stated capacity
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.
DEWALT 20V MAX 5Ah Lithium-Ion Battery and Charger Kit with Bag (DCB205CK)
A genuine DeWalt kit that pairs a high-capacity 5Ah pack with a charger and bag — good value if you're adding runtime to an existing 20V MAX toolkit or starting fresh.
More Comparisons
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