Hi, Regarding the shut down issues. Both of my 300's have done the same thing. In a chat with Tech. Support we downloaded Beta 2.51 and it seems to have solved the unscheduled shut down issue. Battery life is yet another and constant headache.
Hi, regarding beta 2.51 I updated both of my Colorado 300's through the web updater while on the phone with a trouble shooter at Garmin. The 2.51 does not yet appear on the drop downs. I was glad to have some handholding. :Dave