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3 x AAA micro:bit Battery Holder with on/off switch – ETC Educational Technology Connection (HK) Ltd
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Geekstory Battery Holder - 5 PCS 3V AAA Battery Case Cover Storage Box with ON/Off Switch and Wire Leads PH2.0 JST Connector Male for BBC Micro:bit Arduino
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Amazon.com: KEYESTUDIO Basic Starter Kit for BBC Micro bit V2, Graphical Programming Built-in Bluetooth Compass, Motion Detection, LED Display Coding for Kids Teens + Battery Holder & USB Cable for Microbit :
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