My MF3’s power connection just broke ... you can see the clasp bit rattling about inside.
I have been ultra careful regarding connecting the power cord, because I distrust the USB Micro B connectors , bluntly they are just too dinky to have any strength. That said the wifes Samsung uses them and is seriously abused by her, plugged in at least once per day. This ine just had an initial connection, and then it was repositioned .. so not imptessed with the build quality of that connection point.
On the bright side despite being a few months old, my supplier just asked me to send it in, for a replacement ... so credit to HiDigital Eye!
The other one had a problem with intermittant power, and he fixed it and returned the unit the next day.
Moral of the story is, when buying these dash-cams, make sure its supplied by someone who looks after their customers!