This head light uses the ebike power and does not require battery.
For newer controller version it can be connected to the (yellow-black) wires from controller.
by holding ebike keypad arrow-up for 2 sec the head light turns on and off.
LED Headlight double 36V
26.32$
Bob Nalleweg (verified owner) –
The light shines up in your face through the top of the lens killing your night vision corrected with a piece of tape). Not a very good beam pattern.
EbikeBC (verified owner) –
Did you adjust the light tilt angle?