You most likely know I'm running a two cam independently hard wired Mobius setup.
First I bought the A lense Mobius from manufacture via eBay, coupled with a 32GB Kingston card. Been running that since 12th August with no issues. Firmware 1.7 shipped with, then upgraded to 2.10 , and now on the latest 2.18 it works on them all, so I reckon you can discount a problem with the firmware.
Now not long after getting my second Mobius, B lense via Banggood, married to a 64GB Kingston I noticed it would revert to a date 01/01/2012 at times. On the day I set off on a touring holiday, it did not start recording at all, so I pulled up and swopped the A lense from the rear to the front windscreen. Got down to Wales charged the Mobius B lense on a mains charger, but was still having problems with it, in that you could not rely on it, date changes missed clips, would start on ignition or not in some cases.
Anyaway long story shortish, during that two week trip I swopped the cams on to each others charging converter cables, swopped the min SD cards between cams. The only constants was the A lens cam worked flawlessly with whatever you married it to, and the B lense cam was unreliable on whatever it was married to. That said supprising thing was driving up home to North Yorkshire from Gloucester on the Saturday about 3.5 hours of driving, and a stop at the services, both cams worked with no problems.Got home updated firmware, no differance, on the Tuesday B lense cam recorded all the journey but the date stamp was wrong again as I found out when I checked it on the Thursday.
Then I got a blue light followed by an altenate red light and so on, it would not button record or switch off and the only way to get the flashing lights to stop would be to reset the Mobius. Anyway on resetting it that last time I noticed it woud not charge on the mains charger, though the light on the mains charge was indicating it was fully charged when it was obvoius it was not charging nor was it charged at all.
Have since been runnig the B lense Mobius on the A Mobius battery no problems.
And today I tested the suspect battery and it initialy showed a voltage of 0.45 volt for a second or two then ZERO. The yellow film covering the soldered contacts came of the battery casing easily and the battery casing itself had the same look you get from near melted plastic ie: uneven surface, and the soldered contacts were both black. As against the A lense battery, its contacts where of a good clean silver appearance and I was unable to remove the film as it still had its adhesive qualities. Obviously the only conclusion I can draw from those facts is, due to low quality soldered joints the battery heated up and failed.
The Mobius resetting to a date of 01/01/2012 is an indication that the battery is not charging and holding said charge as it should. Try recording a bit of video on a charged Mobius, then disconnect and reconnect the battery and record few seconds of video. The latter video will show 01/01/2012.
Hope the above helps with your problem, I reckon its your battery though.
I have sent an email to Banggood today, explaining the problem with supporting photo's and await a reply from them.