Adafruit
2 x AAA Battery Holder with On/Off Switch JST PH Connector
A slim 2×AAA battery holder with a built-in on/off switch and genuine JST PH connector. Two AAA batteries in series provide approximately 3V — ideal for powe...
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A slim 2×AAA battery holder with a built-in on/off switch and genuine JST PH connector. Two AAA batteries in series provide approximately 3V — ideal for powering low-voltage electronics projects, microcontrollers, and portable builds.
The JST PH connector polarity matches Adafruit's Li-Ion/LiPo batteries and 2-pin JST cables, plugging straight into boards with JST PH battery inputs. This is also a great replacement for the battery packs that come with micro:bit boards — the on/off switch means you don't have to unplug the connector to power down.
Key Features
- On/Off Switch – Conveniently control power without disconnecting
- Genuine JST PH Connector – Correct polarity, smooth fit in JST sockets
- Slim Form Factor – Compact AAA-sized holder for small projects
- Standard AAA Batteries – Widely available and easy to replace
Specifications
- Battery Type: AAA (not included)
- Cell Count: 2 (series)
- Output Voltage: ~3V nominal (alkaline), ~2.4V nominal (NiMH rechargeable)
- Connector: JST PH 2-pin
Ideal For
- micro:bit projects (replacement battery pack with on/off switch)
- Adafruit boards with JST PH battery inputs
- Portable electronics and wearable builds
- STEM education and classroom projects
Package Contents
- 1× 2×AAA Battery Holder with On/Off Switch and JST PH Connector
Jargon buster
Plain-language definitions for the technical terms used above.
- JST PH
- A small keyed plug-and-socket connector with 2 mm pin spacing, often used for low-power electronics connections. You need the correct JST PH cable, and its current rating limits how much power should be passed through it.
- LiPo
- A LiPo (lithium polymer) battery is a rechargeable lithium battery widely used in portable projects because it is light and compact. LiPo cells need correct charging circuitry and careful handling to stay safe, so equipment that supports LiPo generally includes charging or protection hardware suited to that battery type.
- pH
- A measure of how acidic or alkaline a liquid is, on a scale where 7 is neutral. For a water monitoring kit, pH tells you about water chemistry and whether the included probe matches the range and accuracy your project needs.
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Power & Batteries
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