BLACK+DECKER BDCS40BI Drill
- Drill
- Battery
- 1.5 pounds
- 4 volts
- More reviewed than 87%
At 4 volts and 1.5 pounds, this is a light duty cordless driver suited to small screws and quick household fixes, not a stand in for a full size drill.
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How it ranks among the 369 drills we track
4.6★ across 2,100 Amazon ratings, Bayesian-smoothed toward the category average.
2,100 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
100+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 369 drills we track - how the scorecard works · full drills data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The BLACK+DECKER BDCS40BI is a battery powered driver running on 4 volts and weighing 1.5 pounds. Its small size and low voltage point it toward light fastening jobs rather than heavy drilling.
BLACK+DECKER pitches tools like the BDCS40BI at buyers who want something smaller and lighter than a full contractor drill, and the 4 volt rating here confirms that positioning. It reads as a tool for small screws and light assembly rather than drilling into studs or masonry.
- 4 volt battery power
- 1.5 pound tool weight
- Battery powered, cordless design
- BLACK+DECKER brand
Who it's for
This suits anyone doing light fastening around the house, such as hanging shelves or assembling furniture with small screws. It is not built for drilling into wood studs, masonry, or driving long deck screws.
Strengths and trade-offs
Drawn from this product's published specifications.
- Lightweight at 1.5 pounds
- Cordless convenience for quick jobs
- Compact size fits tight spaces
- 4 volt power limits heavy drilling
- No stated chuck size or torque
- Battery runtime not listed
Performance notes
The 4 volt battery keeps the tool down to 1.5 pounds, making it easy to hold at odd angles for short bursts of driving. That same low voltage caps the torque available, so it is better matched to small fasteners than sustained drilling.
Specifications
| Brand | BLACK+DECKER |
|---|---|
| Model | BDCS40BI |
| Power Source | Battery |
| Item Weight | 1.5 pounds |
| Voltage | 4 volts |
Other BLACK+DECKER drills
How it compares
This product against the closest alternatives we track in drills.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| BLACK+DECKER BDCS40BI DrillThis product | 4.6 / 5 | 2,100 | 4.2 / 5 |
| AVID CD316-20 DrillAVID | 4.6 / 5 | 23,200 | 4.6 / 5 |
| SKIL SD561801 DrillSkil | 4.7 / 5 | 11,399 | 4.6 / 5 |
| Hi-Spec DT30317R-CA DrillHi-Spec | 4.4 / 5 | 14,822 | 4.5 / 5 |
| Fanttik E1 Max DrillFanttik | 4.5 / 5 | 7,298 | 4.5 / 5 |
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Questions about the BLACK+DECKER BDCS40BI
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What voltage does the BLACK+DECKER BDCS40BI run on?
4 volts.
Is the BDCS40BI corded or cordless?
Cordless, it runs on battery power.
How much does the BDCS40BI weigh?
1.5 pounds.