Which pack gives more power in the same tool?

The DCB2104. DeWalt rates it at 50% more power than the DCB240, and its tabless cells are the reason. The XR Premium 4.0Ah makes no extra-output claim.

Which one lasts longer over years of use?

The DCB2104 is the safer bet. Tabless cell technology is designed for more cycles, and it carries a 3-year limited warranty. The XR Premium's warranty is not stated.

Is the XR Premium worth the extra money?

Only near its $57.49 low. The DCB2104 has recently sold for $51.99 to $63.70, so paying much above that for the older pack is hard to justify.

Which is lighter to hold?

The XR Premium, at about 1.4 lb. DeWalt does not publish the DCB2104's weight, so if balance on overhead work matters, the older pack is the known quantity.

Will both fit my existing 20V MAX tools and charger?

Yes. Both are 20V MAX packs and work with the full line of 20V MAX tools and chargers. Neither includes a charger.

How fast do they charge?

The XR Premium charges in about 60 minutes. DeWalt does not list a charge time for the DCB2104, so expect similar results on the same charger.

DEWALT 20V MAX Battery XR POWERPACK 4Ah Lithium Ion Battery (DCB2104) vs DEWALT 20V MAX XR Premium Lithium-Ion 4.0Ah Battery Pack

Both are 4.0Ah 20V MAX packs that fit the same tools and chargers. The DCB2104 is the newer XR POWERPACK with tabless cells, an overmolded base and a 3-year warranty; the XR Premium 4.0Ah is the older, lighter pack at about 1.4 lb. On price the DCB2104 has run lower, from $51.99 to $63.70 since October 29, while the XR Premium has swung from $57.49 to $149.00. Buy the DCB2104 unless you specifically want the lighter pack.

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