after i charged up the 478, i turned it on and left it outside for about an hour. it seemed to pick the satellites up quick but i wanted to see if it kept the time. at 4pm, i turned the unit off and this morning when i turned it back on (6am), the clock read 10:30 pm. so it seems that the internal clock can only keep the time for about 6 hours or so. i'm going to check and see what time the clock reads when i go back out to the bike later.
now i'm just waiting for the receipt from the ebay seller so i can contact garmin.
2009 BMW R1200GS Adventure
2008 Yamaha FZ-6
1983 BMW R100RS
2013 KTM 350 XCF-W