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This is a two-pack of DeWalt's 20V MAX XR POWERPACK batteries at 4.0Ah capacity. The POWERPACK line uses pouch cells rather than the cylindrical cells in DeWalt's standard packs, which makes each battery lighter and more compact for the same capacity. Two packs let one charge while the other runs, so a tool stays in rotation on longer jobs. It suits anyone already on the DeWalt 20V MAX platform who wants lighter packs than the older 4.0Ah cylindrical batteries, though the 5.0Ah and FlexVolt packs still deliver more runtime for heavy cutting and grinding.
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Owners like the weight savings over DeWalt's older 4.0Ah packs and treat the two-pack as a practical way to keep tools running. Some report shorter service life than cylindrical packs under hard, continuous load.
The DeWALT DCB2104-2 is a two-pack of 20V MAX XR POWERPACK batteries, each rated at 4.0Ah. It is made for the DeWALT 20V MAX cordless platform and works with tools that use interchangeable 20V MAX batteries, such as drills, impact drivers, saws and lights.
With two batteries in the package, one can stay in the tool while the other is on the charger or held in reserve. The 4.0Ah capacity is meant to balance runtime against pack size and weight, for everyday fastening, cutting, drilling and general construction work.
