Comparison page

ULN2003 vs 18650 Battery Holder

Side-by-side selection notes for specs, ecosystem readiness, known issues, and data confidence. This page is generated from structured component fields instead of a hand-written article.

ULN2003

Projects needing Driver array and Stepper kit with a commonly available power part.

18650 Battery Holder

Projects needing Battery holder and Mechanical with a commonly available power part.

Specification Matrix

DimensionULN2003 18650 Battery Holder

CategoryPowerPower

MakerTexas InstrumentsGeneric

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduinoNeeds verification

Price$0.10 - $0.60$0.20 - $2.00

Known Tradeoffs

ULN2003

Breakout boards may use different pin labels or regulator choices
Clone modules can differ from the original datasheet part

18650 Battery Holder

Breakout boards may use different pin labels or regulator choices
Clone modules can differ from the original datasheet part

Open Individual Model Pages

ULN2003

Texas Instruments

Darlington transistor array often sold with 28BYJ-48 stepper motor kits.

China-madePower82% confidence

18650 Battery Holder

Generic

Battery holder component useful to include because many maker power designs depend on its mechanical format.

China-madePower64% confidence