It seems I have heard.
Today I was going to send them a message telling abou thet bad way to charge the GPS. And before I get in touch with them, I get to take a last look at the accessories. And I found this:
https://buy.garmin.com/shop/shop.do?pID=68333
https://buy.garmin.com/shop/shop.do?pID=68332
https://buy.garmin.com/shop/shop.do?pID=13545
I only hope that the last charger is for connection to the car mount because I think that it is the same connector.