Lithium Steppe
← Back to tier list
VelgoNyx 8Ah Replacement Compatible for Dewalt

VelgoNyx 8Ah Replacement Compatible for Dewalt

Tier C

by VelgoNyx

$25.00

All-around "not great" pack. Could work on a drill or other low-power tool. But at high power, despite having great cells, the pack has a tendency to get melted plastic on the contacts for your tool.

amazonView on Amazon →

Ratings

Honesty
1.8 / 5

Measured capacity is 4Ah, half of the 8.0Ah claim.

Durability
1.2 / 5

Low-quality tool contacts risk getting melted plastic on your tool.

Capacity
3 / 5

4Ah measured capacity, half of the 8.0Ah claim.

Power
1 / 5

Solid power delivery, but the plastic around the tool contacts will melt with extended use.

Safety
3 / 5

No safety features and shoddy electric current routing.

Testing Statistics

Stated capacity8 Ah
Measured capacity71.8 Wh
Pack internal resistance65.4 mΩ
High-power cycles survived6
Peak sustained power897 W
Energy delivered (failure test)32.7 Wh
Cost per measured Wh$0.35 / Wh

Cell notes

EVE Energy ICR18650/20P. Rated 30A max continuous discharge, 2000mAh capacity.

Cycling Test

We cycle the batteries at high-power (800W for 20s on, then 20W for 6s off) to reflect their actual usage in high-load scenarios like circular saw use.

Cycles survived: 6 | Failure mode: Battery thermistor reached cutoff

Capacity Test

We measure the amount of usable energy the pack supplies from 100% to 0% charge.

Capacity: 71.8 Wh (50% of stated 8 Ah @ 18V Nominal)

Pack Internal Resistance Test

Pack Resistance: 65.4 mOhm (average value of pack resistance between 17.5 and 18.5 V)

Failure Test

The battery is stepped through 30s at increasing current levels, ignoring safety features like temperature and voltage warnings, until the pack fails catastrophically.

Energy discharged: 32.7 Wh, Peak power: 897 W

Teardown Photos

Suggest a battery to test: