usb port

I use cigarete lighter with alligator clips that go on battery terminals. Then I run USB cord /charger up to my phone on bars. It's removable and use it to charge my phone on long rides since my phone is my speedometer.
 
A fun little project. You can get some cheapo cig-lighter/usb charger from Wallyworld, and salvage-out the guts. Normally not very complicated, just a tiny 5v/500mw regulated power supply chip and the USB socket, usually on one tiny printed-circuit board. Additional features could be an LED indicator and on/off switch.

Don't let it intimidate you, it's really simple, think of it as wiring in an indicator bulb, just +12v and GND.
 
I had a phone holder for a phone I no longer have. It had 2 USB charging ports in it. Salvaged it out and fitted them into my Tahoe's dashboard. Newer stuff is quite smaller. The switch allows either constant-on or IGN switched power...
 

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use cigarete lighter man, u can buy usb cigarette lighter adapter at amazon like that
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