Will the DeWalt DCB205 20V MAX XR 5Ah battery work with the DeWalt DCD800B 20V MAX XR 1/2 in. brushless drill/driver (tool only)?

Why

• ✓ Both use DeWalt 20V MAX battery platform (incl. XR and POWERSTACK).

Good to know

• XR and POWERSTACK are 20V MAX batteries, not separate platforms; DeWalt product pages say they are compatible with all 20V MAX tools and chargers.
• '20V MAX' is the maximum initial (no-load) voltage; DeWalt states nominal voltage is 18V. Outside North America the same battery family is marketed as DeWalt '18V XR' (same pack, different marketing; reported by ToolGuyd, not a DeWalt page). Chargers are region-specific because of mains voltage (120V vs 230V).
• Not interchangeable with DeWalt 12V MAX batteries.
• Black+Decker 20V MAX and Craftsman V20 batteries are separate systems even though Stanley Black & Decker owns all three brands; they do not fit DeWalt 20V MAX tools without third-party adapters.
• DeWalt's DCA1820 adapter lets 20V MAX batteries run most older DeWalt 18V (NiCd/NiMH) tools, with exceptions; DeWalt says not to use it with DCB200/DCB204/DCB205 or batteries over 4Ah in DC970/DC759 compact drills.

Sources

• DeWalt DCD800B 20V MAX XR 1/2 in. brushless drill/driver (tool only): specs from DeWalt product page, checked against the source 2026-10-07.
• DeWalt DCB205 20V MAX XR 5Ah battery: specs from DeWalt product page, checked against the source 2026-10-07.
• DeWalt 20V MAX battery platform (incl. XR and POWERSTACK): DeWalt's main slide-on battery system; every 20V MAX battery (standard, XR, POWERSTACK) fits every 20V MAX tool and charger, and FLEXVOLT 20V/60V batteries also work in 20V MAX tools. (DeWalt DCB203 product page; DeWalt DCA1820 support article).

Check your exact setup

Other parts in the cart, current configuration (installed memory, fan brackets) and adapters can change the answer.