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It's powered by USB battery bank and a USB-PD breakout module that tells the battery bank to output 12V. I put them inside a zip-lock bag inside the 3D printed box. It's water proof enough for the sonoran desert.
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this post was submitted on 21 Aug 2026
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ebike lights have wires to connect to an external source of power. The vast majority of regular bike lights have integrated batteries. (Excluding dynamo powered ones of course)
Where is the advantage in that outside of an actual ebike with battery?
Having a single battery and integrated running lights that are always present is convenient compared to having discrete lights on the frame that need seperate charging/replacement and need to be brought with you and stowed when not in use. At least that's been my experience. Less to charge, less to remember to bring.
Yep, it's basically the SEO term I use to find "bike lights without a battery"