Shame on Garmin for not being compliant with the USB standard!! Anyway, playing with a multimeter and some long cables I have determined that the watch doesn't reset when the voltage is about 5.1V, but at 5.2V it resets. I'm planning on putting an inline resistance and capacitor in my charging cable to fix Garmin's poor design. Plugged, and unplugged, and it showed that it was charging. Woke up, and it had not been charging. Made it through my run with ~35% and tried plugging it into my laptop. This time, it froze and the time set itself back an hour and X minutes (weird? Not even a full hour). I attempted a Factory Restore Settings to no avail. This message should only occur with a cable that didn't come with the Forerunner 645, such as a cable for the Forerunner 230/235/630. Do you have on of those devices and maybe the cable got mixed up? If not, I would encourage you to reach out to our Product Support team so that we can look at this further to try and determine why this occurred. Safety: Charging Your Garmin Forerunner 235/230/630 watch fast and safety as original More Convnient: 1.2M/3.93 Ft Length, Double than your original cable Fast : Charging and Data Transfer, 100% Compatible A dedicated community for Garmin users to ask questions, provide answers, and share feedback. Forerunner 230/235 replacement I'm on vacation in Florida and Garmin Approach G10 , Approach S20 , Forerunner 230 , Forerunner 235 , Forerunner 35 , Forerunner 630 , Forerunner 735XT , Vivomove HR See more: Compatible phone models: Garmin Forerunner 35 230 235 630 645 Music 735XT, Approach G10 S20, Vivomove HR: Included components: Charging Stand: Special feature: Lightweight Design, Fast Charging: Colour It won't charge faster than its charging circuit allows. Of course the above assumes you didn't buy some piece of crap charger off of ebay or out of a $1 bin at the Quik-E-Mart. That POS might not regulate the voltage well and present something other than 5VDC, or it may pass off raw rectified AC as DC. 920xt won't charge in the battery clip. kwillard47 over 8 years ago. Everything has been fine with the 920 for a month, and suddenly -- nothing. I put it on the clip two days ago, at about 70%, and now the battery is fully discharged. I have tried other computers, other USB ports of this computer, wall chargers. At this point the battery also shows a reduction, usually holding around a 50-75% charge. The next day the battery will be dead. A couple other observations are: 1) If I soft reset the watch at any point during the week the watch begins working as expected but the same process resumes (in other words, if Bluetooth and the sensors won’t Wpf5.

garmin forerunner 230 not charging