Adafruit 9V battery holder with switch & 5.5mm/2.1mm plug

Compact and convenient, this 9V battery pack features an integrated on/off switch and a pre-attached 5.5mm/2.1mm center-positive barrel plug, ensuring a hassle-free experience for powering your electronic projects.Perfectly suited for Arduino, Raspberry Pi, or other microcontroller applications, this battery holder offers simplicity and efficiency without any assembly required. Simply connect your project and flip the switch for instant power.Whether you are building a portable sensor, DIY robot, or any creative endeavor requiring a steady power source, this pack is the ideal solution. Note: Battery and screw are not included.For an understanding of how a 9V battery operates, refer to Collin’s Lab Notes for an insightful video overview.