GRENPRO

GRENPRO 071921-8V Drill

Drill
2 amps
Battery
8 volts

4.6/ 5 on Amazon46Amazon ratings100+bought last month3.9ProductDome score

Medium confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forYou need a light, compact cordless driver for occasional small jobs

A compact 8 volt driver with a 2000 mAh battery, best matched to light screw driving rather than heavy drilling given the power level.

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ProductDome scorecard

How it ranks among the 369 drills we track

3.9/ 5ProductDome scoreMedium confidence

Owner satisfaction · 56% of scorecategory median 4.5★4.6

4.6★ across 46 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 295 ratings2.1

46 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score2.7

100+ bought on Amazon last month.

Data quality · 11% of score3.8

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: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.

Overview

An 8 volt cordless drill from GRENPRO, model 071921-8V, powered by a 2000 milliamp hour battery with a top speed of 800 RPM. The 8 volt platform places it toward the lighter end of cordless drills.

Compared with full size 18 or 20 volt drills, an 8 volt platform running at 800 RPM points to a compact driver meant for light screw driving and small holes rather than boring into hardwood or metal. No chuck size or torque setting is listed.

4.6 star rating from 46 reviews
100 units bought in the past 30 days
8 volt power, 2000 mAh battery
800 RPM top speed

Who it's for

Buyers who need a small, light cordless driver for occasional screws and light drilling. Not built, based on its power spec, for demanding drilling or driving work.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

Compact 8 volt size for light tasks
2000 mAh battery capacity
Bought 100 times in the past month

What to check first

800 RPM and 8 volts are low for hardwood or metal drilling
No chuck size or torque setting listed

Performance notes

The 2000 mAh battery feeds an 8 volt motor topping out at 800 RPM, enough torque for driving screws and light drilling but not for demanding boring work.

Specifications

Brand	GRENPRO
Model	071921-8V
Amperage	2 amps
Power Source	Battery
Voltage	8 volts
Dimensions	17 × 6 × 6 inches
Speed	800 rpm

How it compares

This product against the closest alternatives we track in drills.

Product	Amazon rating	Ratings	ProductDome score
GRENPRO 071921-8V DrillThis product	4.6 / 5	46	3.9 / 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

Frequently asked

Questions about the GRENPRO 071921-8V

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

What voltage is the GRENPRO 071921-8V drill?

It runs on an 8 volt battery.

What is the battery capacity?

2000 milliamp hours.

What is the top speed?

800 RPM.