I understand that use of USB does not charge the batteries. But if I use a portable, pocket size USB power pack, will the Spot 3 use the combined energy of both the USB power source plus the lithium batteries? or will it disable battery connection, so the only available power is from the portable power pack?
One use I have in mind is to hide the Spot 3 in the outboard motor compartment (when not in use) together with a USB connection to a power pack to extend or add to battery life. (I have had a motor stolen previously)
Note: Your answer at http://support.gtc.co.uk/customer/en/portal/articles/1703220-can-spot-trace-be-plugged-in-to-an-external-power-source- does not fully answer my query.
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