Comparison page

PCF8574 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.

PCF8574

Projects needing IO expansion and I2C with a commonly available power part.

18650 Battery Holder

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

Specification Matrix

DimensionPCF8574 18650 Battery Holder

CategoryPowerPower

MakerNXPGeneric

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduino, MicroPythonNeeds verification

Price$0.20 - $1.00$0.20 - $2.00

Known Tradeoffs

PCF8574

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

PCF8574

NXP

I2C GPIO expander often used in LCD backpacks and small IO expansion modules.

China-madePower84% confidence

18650 Battery Holder

Generic

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

China-madePower64% confidence