This?
https://www.brompton.com/shop/bike-accessories/cateye-rapid-mini--usb-rear-light#
Thanks, got one of those and temporarily put it on. They're great.
But, I'm more looking for something that will connect with the battery on the bike, as this is brompton is going to be used only for transport.
@Muppetteer started
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This?
https://www.brompton.com/shop/bike-accessories/cateye-rapid-mini--usb-rear-light#