Adafruit
3 x AA Battery Holder with 2.1mm Plug
A compact battery holder for three AA cells with an integrated power cable and DC barrel jack. The series configuration delivers approximately 3.6–4.5V depen...
A compact battery holder for three AA cells with an integrated power cable and DC barrel jack. The series configuration delivers approximately 3.6–4.5V depending on battery chemistry, making it a convenient power source for 3.3V microcontroller projects and portable electronics.
The 200mm power cable terminates in a 2.1mm DC jack (centre-positive polarity), ready to plug directly into Arduino boards and other devices with a standard DC barrel input.
Key Features
- 3× AA Series Configuration – Outputs ~4.5V (alkaline) or ~3.6V (NiMH)
- DC 2.1mm Barrel Jack – Centre-positive polarity, compatible with Arduino and similar boards
- 200mm Power Cable – Provides flexible placement away from your project
Specifications
- Battery Type – 3× AA (not included)
- Output Voltage – ~3.6V (NiMH) to ~4.5V (alkaline)
- Connector – DC barrel jack, 2.1mm ID, centre-positive
- Cable Length – 200mm
Ideal For
- Powering Arduino and 3.3V microcontroller projects
- Portable electronics and sensor nodes
- Replacing LiPo batteries where recharging isn't needed
Package Contents
- 1× 3-Cell AA Battery Holder with DC 2.1mm Plug
Jargon buster
Plain-language definitions for the technical terms used above.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
- LiPo
- A lithium polymer rechargeable battery commonly used in portable electronics projects. It matters because LiPo batteries need correct charging circuitry and care, and this board includes hardware intended for that battery type.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
Find this product in
Power & Batteries
Related Tutorials
Free guides on learn.littlebird.com.au
