It depends on the Roadmate that you have. :
- If your Roadmate has a separate plug-in port for charging your unit IN ADDITION TO a USB port, then no, your Roadmate cannot be charged using your computer via the USB cable.
- If your Roadmate only has a USB port available for charging your unit, then yes, you can charge it via your computer via USB.
However, please note, according to Magellan, charging your unit using your PC via USB can take up to 12 hours to charge vs. 4-6 hours when using the vehicle power adapter.
FYI: This is mainly due to USB constraints on pretty much all electronic devices. USB cannot carry the same amount of power to a device. It uses what is commonly known as a 'trickle' charge to recharge a device. It carries much less current than a full-blown charger (like an AC power adapter).
It also works w/my USB/AC charging Adapter
SOURCE: Can I charge my magellan roadmate 1340 using the USB?
Should be able to so long as it is set up for it, plug it in and see if the power light comes on, then leave it for an hour, at that time see if you can turn the unit on. You will at this point have your answer to your question. Make sure the computer is on though. (i know, but i didn't put that in one time and i got a nasty message from somebody, so now i put it in.)
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