I just built an E-Bike and I'm trying to work out a way to power lights from the low voltage feed from my controller.

Headlights are due to arrive or today or tomorrow.
-------------------------------------------
I bought two super cheap battery powered lights. SUPER cheap. I'm just testing this. I have a 5 Volt supply. I'm hoping to drill small holes in the batter case, run wires in, and solder the wires directly to the battery leads.

I'm sure they are not very good lights, but with two of them, they'll have to do until I can get something better. (If this even works)