As micro:bit is gaining traction in this region, powering it is a must :)
If you are new to micro:bit, it is a powerful embedded platform or microcontroller board with easy to get started features, even easier than Arduino. It can be powered by USB microB when loading program, or you can use 2 x AA batteries. So here comes the battery holder for this microcontroller.
This is a 2 x AA battery holder for micro:bit with cover and ON/OFF slide switch. Neat!