I bought the DCD800B as a bare tool to replace a tired DCD791 that had developed a wobble in the chuck after about four years of cabinet hanging and trim work. The new drill has been on the truck since October, has driven somewhere north of 8,000 cabinet screws, hung four prehung interior doors, and bored every door knob hole in a small flip with a 2-1/8 inch hole saw. After roughly seven months of daily use, the chuck still locks tight, the motor still feels strong, and the trigger response is what I want from a compact driver: linear, with usable low speed.
Why you should trust this review
I work as a finish carpenter and run a small remodeling crew. I bought this drill at retail with my own money, no manufacturer involvement. My existing 20V MAX kit includes seven batteries ranging from 1.7 Ah compact packs up to 8 Ah PowerStack and 12 Ah FlexVolt batteries, so the drill has been tested across the platform’s full battery range. Before publishing I drove a known load (3-inch GRK structural screws into pressure-treated 2x10) until each battery cut out, repeated three times, and averaged the result.
How we tested the DCD800B
- Drove 3-inch GRK structural screws into pressure-treated 2x10 with a 5 Ah pack until cutout, three runs averaged.
- Drilled 1-inch spade bits through doubled 2x4 framing for HVAC chase work.
- Bored 2-1/8 inch door knob holes through solid-core interior doors with an Irwin bi-metal hole saw.
- Ran a Milwaukee 1-inch self-feed bit into a single 2x10 stud as a stall test.
- Sat the drill in a 20-degree truck overnight, then started it cold to test low-temperature trigger response.
- Measured the head length with calipers and compared with the rated spec.
- See our methodology page for the full approach we use across cordless tools.
Who should buy the DEWALT DCD800B?
Buy this drill if you already own DEWALT 20V batteries and want a compact daily driver that handles 90 percent of the work a residential carpenter does. It is also a strong choice if you are leaving a worn-out DCD791 or DCD771 because the head is shorter and the LED is better placed.
Skip this drill if you regularly drill into concrete or brick (get the DCD805 hammer drill instead), if you do production deck framing with 4-inch ledger bolts (use a 1/2-inch high-torque drill like the DCD999), or if you are starting from zero and have no batteries (a kit like the DCD800D2 is a better entry point than building from a bare tool).
Power and torque: enough for almost any wood task
DEWALT rates the DCD800B at 340 UWO. That is the practical equivalent of about 600 in-lb of peak torque, which lines up with what I see on the bench. The drill drove 3-inch GRK screws into pressure-treated lumber without bog-down, and only stalled when I asked the 1-inch self-feed bit to start in a knot. The 3-speed gearbox is the real story. Speed 1 (0-450 RPM) gives me enough fine control for cabinet screws into MDF without stripping. Speed 2 (0-1300 RPM) is the all-day setting. Speed 3 (0-2000 RPM) drills small pilot holes faster than the old DCD791 ever could. For mixed-task days, the third gear genuinely earns its place.
Compact size: the reason I bought it
At 6.3 inches from chuck face to back of motor housing, the DCD800B is short enough to fit inside a standard 16-inch on-center stud bay without rotating the drill sideways. That matters when you are hanging interior doors and need to drive hinges from inside the bay. My old DCD791 measured 7.0 inches and required a right-angle attachment for the same task. Weight at 2.4 lb (bare) feels balanced with a compact 1.7 Ah pack and slightly nose-heavy with a 5 Ah, which is the trade-off across the entire 20V class.
Battery and runtime
With a 5 Ah pack on the 3-inch GRK test, the drill averaged 312 screws before cutout across three runs. With an 8 Ah PowerStack, the same test produced 482 screws on average. Cold weather drops both numbers by roughly 15 percent, which is normal lithium chemistry behavior, not a fault of the drill. For typical cabinet days, a single 5 Ah pack lasts me from start to lunch, and the second pack covers the afternoon.
Build quality and chuck
The all-metal 3-speed transmission is the part that worries reviewers because cheap drills cut corners here. The DCD800B has held up. After seven months I cannot detect runout in the chuck against a dial indicator, and the gearbox still shifts cleanly between speeds without grinding. The one weakness I have found: the ratcheting chuck slips slightly when I run a 3/4-inch ship auger into wet pressure-treated wood. For that work, I switch to a keyed-chuck drill anyway, so it is not a daily problem.
Verdict context
If you are reading this against the Milwaukee 2904-20 M18 FUEL review, the short version is that the Milwaukee has more torque on paper and a better feeling chuck, but costs $60 more for the bare tool. If you are already on DEWALT 20V, the DCD800B is the right buy.
DEWALT DCD800B 20V MAX XR Brushless Compact Drill/Driver vs. the competition
| Product | Our rating | Torque | Length | Speeds | Price | Verdict |
|---|---|---|---|---|---|---|
| DEWALT DCD800B | ★★★★★ 4.6 | 340 UWO | 6.3 in | 3 | $139 | Editor's Choice |
| Milwaukee 2903-20 M18 FUEL | ★★★★★ 4.7 | 1200 in-lb | 6.9 in | 2 | $199 | Top Pick Pro |
| Makita XPH14Z 18V LXT | ★★★★★ 4.5 | 1090 in-lb | 7.0 in | 2 | $159 | Recommended |
| Ryobi P252 18V One+ | ★★★★☆ 3.9 | 750 in-lb | 7.5 in | 2 | $99 | Skip for Pro Use |
Full specifications
| Voltage | 20V MAX |
| Motor | Brushless |
| Max torque | 340 UWO |
| Chuck | 1/2 inch ratcheting metal |
| Speeds | 0-450 / 0-1300 / 0-2000 RPM |
| Clutch settings | 11 plus drill |
| Head length | 6.3 inches |
| Weight (bare) | 2.4 lb |
| LED | Yes, 20-second delay |
| Warranty | 3 year limited |
Should you buy the DEWALT DCD800B 20V MAX XR Brushless Compact Drill/Driver?
The DCD800B is the compact 20V drill most carpenters on the DEWALT platform should buy. The brushless motor pushes 340 UWO of torque, the 3-speed all-metal gearbox lets it bridge driving and small hole drilling, and the 6.3-inch head length fits between studs without an extension. Sold as a bare tool, so price assumes you already have batteries.
Frequently asked questions
Is the DEWALT DCD800B worth $139 in 2026?+
If you already own DEWALT 20V batteries, yes. The bare-tool price gets you a brushless compact drill that holds its own against tools costing 30 percent more. Without batteries on hand, the kit version (DCD800D2) makes more sense for first-time buyers.
DCD800B vs DCD791B: which is the right upgrade?+
The DCD800B replaces the DCD791B with a smaller head, better LED, and a 3-speed gearbox instead of 2. If you already have the DCD791 and it works, do not upgrade. New buyers should pick the DCD800B every time.
How much torque does the DCD800B actually have?+
DEWALT rates the tool at 340 UWO (Unit Watts Out), which translates to roughly 600 in-lb of peak torque under load. That is enough for 1-inch spade bits and 3-inch lag screws into softwood, though dedicated hammer drills handle masonry better.
Should I buy the DCD800B or the DCD805 hammer drill?+
If you drill into concrete or brick more than a few times a year, get the DCD805 hammer drill. For wood, drywall, light metal, and general assembly, the DCD800B is lighter, shorter, and easier to use one-handed.
📅 Update log
- May 9, 2026Refreshed pricing and confirmed 3-year warranty terms.
- Aug 12, 2025Initial review published after 7 months of jobsite use.
