Angled shot of Adafruit HalloWing M4 Express.
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This is Hallowing..this is Hallowing... Hallowing! Hallowing!  Following up on 2018's most-successful-skull-shaped development board, we UPPED our -skull-shaped...
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Slim Lithium Ion Polymer Battery 3.7v 400mAh with JST 2-PH connector and short cable
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Lithium-ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light, and powerful. The output ranges from 4.2V when completely charged to 3.7V. This battery has a capacity of 400mAh for a total of about 1.9 Wh. If you need a larger (or smaller!)...
$6.95 each
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