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![2 x AA Battery Holder with On/Off Switch & JST PH Connector - The Pi Hut](http://thepihut.com/cdn/shop/products/2xaa-battery-holder-with-on-off-switch-jst-ph-connector-the-pi-hut-104180-28609382514883_1200x.jpg?v=1646830443)
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This battery holder connects 2 AA batteries together in series for powering all kinds of projects. We spec'd these out because the box is fairly slim, and 2 AA 1.5 cells add up to about 3V for many low voltage electronics projects, plus it has a nifty on-off switch.
Fits any standard AA battery. When using rechargeable NiMH batteries you'll see ~2.4V output, or use with 1.5V alkaline cells for ~3V output.
The polarity matches that of our 2-pin JST cable and Li-Ion/Poly batteries. Uses a genuine JST connector so it won't 'catch and tear' in JST connectors.
This is great for the micro:bit because it has an on-off switch built in so you don't have to yank it out to turn off the power, and the AA batteries will last 3 to 5 times longer than AAA.