[owenwil]

This is a great article with a lot of lovely detail and photos…and yet I was left wondering how the author actually connected it to the e-bike’s battery—was it directly? Via the bike’s charging port? I’d love to know more about the actual mechanics of _that_ and how they went about it because I’ve long wondered why these modern e-bikes don’t offer more ways to charge other devices from them (with a few exceptions in the Bosch lineup, with the ‘smart hub’ that they sell).

[transistor-man]

Thanks for the question, I completely missed that part. I'm using a homemade e-bike where the battery is just connected with a standard Anderson connector. A lot of off the shelf battery modules do have proprietary connectors, but a fair number have been documented. The M365 scooter batteries for instance are 36V 9AH and they connect with a hobby XT series connector.