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LiPo Battery Switch

Lithium Ion Polymer (LiPo) batteries, such as the ones I used from Adafruit, often come pre-attached with a 2-pin JST-PH male connector that slots straight into a JST-PH jack on whatever device requires powering. This is great for permanently on devices, but I often want to turn my devices on and off by connecting and disconnecting the power from the battery.

So, I made a switch using a male and female JST-PH connector and jack and a switch. (Hindsight says this would have been slightly easier if I had adapted a JST-PH battery extension cable!



One side of the switch was connected directly to the negative terminal on a JST-PH male connector. The other side of the switch connected to the negative terminal of a JST-PH female jack. The positive terminal of the JST-PH male connector was wired directly to the positive terminal on the JST-PH female jack. I have used a dab of red nail varnish to indicate the "on" position.


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This Battery Switch mini project is provided as an addition to my WineTime project. See the related 'Thingatron' mini project too:

I am an inventor, engineer, writer and presenter. Other stuff: Royal Academy of Engineering Visiting Professor of Engineering: Creativity and Communication at Brunel University London; Founder of the Guild of Makers (; Fellow of the Institution of Mechanical Engineers and have a PhD in bubbles; Judge on BBC Robot Wars.

1 Feb 2018, 13:58