I'm mailing a transponder and to make there's nothing wrong with it, I gave 'er a full charge. Will the USPS have issues with a small device emitting an unknown radio signal? Thanks
take it out, plug the charger into the base, put the transpoder back in for a minute, and then unplug the chrager, but dont remove the transponder from the base. the light shouldnt come on till it's removed from the base. put a zip-tie around it to hold it in during shipping.
Incidentally, the old ones will shut off if you touch a 9-volt battery to the leads on the back... Don't leave it there, just touch it for a second or so.