We wanted to compare two DeWalt 4Ah battery packs. Looking at the DeWalt 4.0Ah DCB204 vs DCB182 battery packs, we don’t find too many differences. Both provide additional runtime and power for DeWalt XR Lithium-ion cordless tools. Metabo announced a similar 4Ah battery in December 2011. That’s around the time 4Ah packs began hitting the market. These 18V Lithium-ion battery packs marked one of the earliest uses of a battery level gauge for DeWalt. Current DeWalt 20V Max battery packs continue to use a 3-bar charge level indicator.
DeWalt DCB182 4Ah Battery Watt-Hours
The DeWalt 4.0Ah battery shows 72Wh on the label. Doing the math, that number correctly reflects the 18V nominal voltage. The math looks like this:
4Ah x 18V = 72Wh
The DeWalt DCB205 Battery Pack Also Has 72Wh
The newer model DeWalt DCB204 4Ah battery pack has the same watt-hours, coming in at 72Wh.
DeWalt 4.0Ah DCB204 vs DCB182 Battery Packs
So what’s the difference? Well, aside from the potential of including different actual 18650 lithium-ion cells, both packs have the same capacity. The real comparison between DeWalt 4.0Ah DCB204 vs DCB182 battery packs simply comes down to marketing. The older DCB182 pack uses 18V nominal voltage labeling. The DeWalt DCB204 4Ah battery uses the newer 20V Max labeling.
If this sounds unusual, please refer to our article on 18V vs 20V Max batteries for more information. We explain how the difference between the two really just has to do with marketing.
