topic Re: Date and Time reset after every switch OFF/ON-M6 mark ii in EOS DSLR & Mirrorless Cameras

Date and Time reset after every switch OFF/ON-M6 mark ii

Femina — Sun, 16 Oct 2022 12:40:03 GMT

Hello,

I am using Canon M6 Mark ii for last one and half years. Recently, every time I switch on the camera, its going to date n time set mode, even when I am not removing the battery and battery is fully charged.

Is there any solution for this issue? Or what should i do to fix the issue?

Thanks in advance.

Femina

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

Waddizzle — Sun, 16 Oct 2022 13:07:16 GMT

Sorry to hear you’re having an issue after such a short time. The main battery charges up an internal circuit that keeps track of time.

Let’s do a couple things to see if we can rule out the main battery. First, switch the camera to P shooting mode. Go into the menus, find the option to “restore factory defaults”, and reset the camera.

If restoring factory defaults does not resolve the issue, we need to take a look at the battery. Is it a Canon branded battery and charger? Do you have a spare battery?

If the issue persists, and you do not have a spare battery, then I recommend two courses of action. You could order a spare battery, which I suspect will not “fix” the problem, but is good to have one on hand, anyway.

Or, you need to contact Canon Support to arrange a repair of your camera.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

Femina — Sun, 16 Oct 2022 13:28:06 GMT

Thank you very much.

Restoring the defaults solved the problem.

I have spare batteries which are not canon brand. will they cause such issues?

Thank you once again.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

Tronhard — Sun, 16 Oct 2022 15:37:49 GMT

Canon, and most folks here, recommend using Canon brand batteries. That said, I have used several different types of 3rd party batteries that have performed as well, if not better than, the Canon brand ones for a lot less investment. It's all about risk. Some brands, or even batches from one brand, may be good and the next are pretty awful. I have some original Canon ones that have been rubbish. If you do go for non-OEM brand batteries, research very carefully as to their performance. All batteries degrade over time, so after a few years you can expect lower performance.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

PhilAngus — Sat, 10 Jun 2023 11:30:22 GMT

I have the same issue. I have had my M6 Mkii about 3 years and hardly used it, I only use it as my second camera for holidays. It still looks brand new. It recently started resetting every time which is a real pain.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

PhilAngus — Thu, 15 Jun 2023 16:07:29 GMT

OK, I know what the cause is now. It is third party batteries. I also have RAVPower batteries. I don't get this issue with the Canon battery. I believe the Canon charges the internal battery circuit, but the RAVPower does not. If I leave the Canon in the camera, the issue is not there. If I leave the Canon in for a few days, then use the RAVPower it is fine, but if I leave the RAVPower in, after a while the internal battery goes flat, and the issue returns. Bottom line is, you can use third party batteries, but if you only use them for long periods of time (for example cycling between two of them for a few weeks), eventually the internal circuit will run flat and the issue will return. Installing a charged Canon battery will soon return the internal battery to a fully charged state

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

BurnUnit — Thu, 15 Jun 2023 23:42:33 GMT

Does your M6 have a menu setting that allows you to register the batteries to the camera? I don't know that it would make any difference but you might try registering your third party batteries to the M6. I was able to register a couple Wasabi batteries to my 60D, but I wasn't having the reset problems you're having.

At the very least I would have to suggest not buying batteries based on low price alone. If you find a battery with a recognizable name that seems to have good reviews that maybe saves you 20% to 25%, then stop your search there. Fight the urge to seek out a deal that might save you 40% or 50%. You're starting to venture into the murky waters of diminishing value.

As for my experiences, I realize that my 60D is getting a bit long-in-the-tooth. Newer model cameras may be fussier about using non-OEM batteries.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

heuristik — Wed, 10 Jan 2024 22:49:20 GMT

About two years ago, I had the same thing happen to me. It's a fairly major repair, but I have a few EF-M lenses and I like the camera a lot, so I paid for it. The tech at Hunt's camera tried all of the easier fixes. Actually, I did too. I knew EOS-M machines were not going to be around much longer, so it seems like a good idea at the time. The fix was actually to replace the camera with a Canon-refurbished one. In any case, the problem you had has /never/ happened to me on any other Canon camera or on my SONY. I realize a sample of 2 isn't very large, but 2 compared to 0 feels meaningful to me, and I wonder if there is some underlying engineering problem. but we'll never know, will we?

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

oluf3mi — Thu, 18 Jul 2024 15:19:49 GMT

All you need to do is change the CR1220 battery. It's usually right beside the regular battery port. I don't see a lot of people talking about this, but the CR1220 battery is what stores the date and time.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

Aniaindah — Tue, 29 Apr 2025 07:47:48 GMT

Same situation with a brand new camera, since the begging with original battery

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

PhilAngus — Fri, 09 May 2025 06:17:17 GMT

You make it sound so simple. There is nothing next to the main battery compartment. All I see is a lot of screws on the underside of the camera. I tried removing these and could not see any way of getting the bottom off. This is quite frankly a ridiculous situation, just to change a battery.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

heuristik — Fri, 09 May 2025 20:45:21 GMT

Whatever is maintaining the date/time is not user-serviceable on an M6-MarkII. It's a "take it to service" repair, and, of course, you can no longer do that. For mine, I opted to have Canon replace mine with a refurbished one, and it's already several years ago. And can I say, it's a terrible design decision by Canon.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

wallylp — Mon, 01 Dec 2025 22:32:49 GMT

My M6 Mark II does not have anything other than the full-sized Canon battery and the SD card! Date and time always reset with the battery change.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

heuristik — Tue, 02 Dec 2025 00:50:09 GMT

There is an internal battery on the motherboard that mantains the date and time. But this battery can fail and on this camera, that failure isn't uncommon. People have posted ways to replace the battery, but they involve a pretty complete teardown of the camera. Canon has no solution either, other than to sell you a refurbished M6MKII. Yu might well ask why Canon didn't make this battery easier to service. It's easy tyo come up with some cynical answers.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

PhilAngus — Wed, 03 Dec 2025 08:36:58 GMT

With battery inserted, charge camera via the USB3 port til the orange light goes out. That fixed it for me

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

PhilAngus — Wed, 03 Dec 2025 08:38:16 GMT

Yes, forget about taking it apart! Stupid suggestion. See my other reply re charging.

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

PhilAngus — Wed, 31 Dec 2025 12:17:20 GMT

Please don't offer useless advice if you don't know the camera. This is completely false for this camera!

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

IthacaNY — Thu, 26 Feb 2026 00:52:26 GMT

There is no other battery near the user removable battery that is obvious. Do you have specific knowledge of this or are you assuming this?

Re: Date and Time reset after every switch OFF/ON-M6 mark ii

PhilAngus — Fri, 27 Feb 2026 11:49:07 GMT

It’s nonsense, posted by someone who doesn’t know anything about the camera. Try my suggestion. It works fine for me now.