Connect a 9V battery directly to Arduino Uno or similar boards using this 2.1mm DC barrel jack adapter – quick and portable power solution. Read more
This 9V Battery to 2.1mm Barrel Jack Connector allows you to power your Arduino Uno, Mega, NodeMCU, and similar boards using a standard 9V battery. Simply snap the connector onto a 9V battery and plug the DC 5.5mm x 2.1mm jack into your Arduino’s power port.
Perfect for portable, battery-powered, or on-the-go electronics projects, this adapter offers a simple, solder-free power solution for beginners and makers.
Snap-on T-style clip for 9V batteries
Output: DC 5.5mm x 2.1mm barrel plug (center positive)
Wire length: ~15 cm
Compatible with Arduino Uno, Mega, NodeMCU, etc.
No soldering required
Lightweight and reusable
Powering Arduino Uno without USB
Battery-powered electronics and prototypes
Quick classroom or lab setups
On-field or portable Arduino project
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