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connecting to usb power source

connecting to usb power source
Most detectors have a telephone style power cord connection. How can I connect to the USB power on my BMW motorcycle?

ANSWERS:

"If I correctly understood, you would like to place a USB port on you motorcycle, in that case you need to step down your battery voltage from 12V to 5V using a regulator, or you can buy a converter like this one :

But you need to make some modifications, the best solution is to put a power bank in your pocket."

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