# DCD999 — Power tool battery platform and accessory interface compatibility For DCD999, brand is DEWALT; system / platform is 20V Max; notes is Hammer Drill with FlexVolt Advantage, recorded from its source on 2026-08-11. - **Item:** DCD999 _(verified: appears in the quote below)_ - **Brand:** DEWALT _(our reading, not quoted from the source)_ - **System / platform:** 20V Max _(our reading, not quoted from the source)_ - **Model no.:** DCD999 _(verified: appears in the quote below)_ - **Notes:** Hammer Drill with FlexVolt Advantage _(verified: appears in the quote below)_ ## What the source says > DCD999 – Hammer Drill with FlexVolt Advantage ## Source - https://toolguyd.com/dewalt-model-numbers-explained/ Last verified: 2026-08-11. Review by: 2027-08-11. Part of [Power tool battery platform and accessory interface compatibility](https://referencesource.org/power-tool-battery-compatibility/).