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Help USB charging port

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lekahj

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I have been browsing google looking for mods done to a dewalt work radio dc011.
I want to install a usb charging port and I don't know how I might wire it in.
I know the battery is a 18v and usb needs 5v, but don't quite know if it would work.
:?:
 

They'll undoubtedly make that a feature on the next model. There is only one output available on the exterior of the unit as made, the battery charge port. You wouldn't want to try using that since it has a charge regulator dedicated to 7.2V to 18V packs.

If it were mine and I wanted to make such a modification, I'd be looking at the internal circuitry to see if there's a 5 volt or more regulated DC generated for the radio or display. If so, I might try to use that to power something like the guts out of one of these: 2-port USB Car Charger Adapter | Overstock.com.

You probably know that any attempt will void your warranty and may result in a non-working unit.
 

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