>>1963409>this seems excessiveNo such thing. Lighting is safety, you're not going to pack up less light just because you ride for less time.
It works for ~4 hours off a single decent 18650 at 5 volts, so you realistically don't need more than a 2-cell bank with the most baisic board. It also seems to work at lower voltages just fine, so you might get away with using one of these charging boards with no step-up converter for extra efficiency, or just straight up leeching straight from a salvaged battery protection board that'll shut it off after getting to 3.7 volts and then charging the batts with an external charger. I'll test that with my next bike build, if this thread survives till march I'll update you on my shitty /gn/ misadventures.
