pickup

Hi all. I got a small bike phone charger kit off amazon and have mounted it behind the light on the front of the bike. I didn't want to connect to permanent live incase it drained the battery. I've checked with my meter for any ignition 12v but can't find anything. Does anyone have a suggestion?

has anyone got the factory speedo to work with a Magnet in the rotor Bolt vrs the factory magnet. I'm building up second set of rims, after market brake rotor has no hole for the magnet and was wondering if the Trail Tech bolt set up would work. Or has anyone setup a trailtech speedo and...