# DCA1820 — Power tool battery and accessory compatibility

For DCA1820, system is DEWALT 18V/20V MAX; platform owner is DEWALT; subject type is adapter; compatible with is DCA1820 will fit most 18V DEWALT tools; the exceptions are listed below, recorded from its source on 2026-08-11.

- **System:** DEWALT 18V/20V MAX _(our reading, not quoted from the source)_
- **Platform owner:** DEWALT _(our reading, not quoted from the source)_
- **Subject:** DCA1820 _(verified: appears in the quote below)_
- **Subject type:** adapter _(our reading, not quoted from the source)_
- **Compatible with:** DCA1820 will fit most 18V DEWALT tools; the exceptions are listed below. _(verified: appears in the quote below)_

## What the source says

> DCA1820 will fit most 18V DEWALT tools; the exceptions are listed below. Please note that on the DC500, DW074, and DW079, it will fit and work, but the door will not close on the battery and adapter.

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Compatible with

support.dewalt.com says compatible with is **DCA1820 will fit most 18V DEWALT tools; the exceptions are listed below.**, as of 2026-08-11.

> DCA1820 will fit most 18V DEWALT tools; the exceptions are listed below. Please note that on the DC500, DW074, and DW079, it will fit and work, but the door will not close on the battery and adapter.

Source: https://support.dewalt.com/hc/en-us/articles/360014537137-18v-Adapter-DCA1820-Compatibility-information

support.dewalt.com says compatible with is **Most DEWALT 20V batteries work with DCA1820. (Excluding 20V Max).**, as of 2026-08-11.

> Most DEWALT 20V batteries work with DCA1820. (Excluding 20V Max).

Source: https://support.dewalt.com/hc/en-us/articles/360014537137-18v-Adapter-DCA1820-Compatibility-information


## Source

- https://support.dewalt.com/hc/en-us/articles/360014537137-18v-Adapter-DCA1820-Compatibility-information

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Power tool battery and accessory compatibility](https://referencesource.org/power-tool-battery-accessory-compatibility/).