topic Re: M6 Mark II Help with internal battery question in EOS DSLR & Mirrorless Cameras

M6 Mark II Help with internal battery question

djjoonie — Tue, 06 Jun 2023 19:46:24 GMT

Hello all, i have m6ii but the date and time resets every time i swap the battery. if i swap it within a sec, it doesnt reset sometimes. So my question is how come it only resets the date and time if its the internal memory battery that is not working? the wifi, bluetooth settings and all my camera settings are all intact even if i leave out the battery for much longer. I already tried the clear all settings on p mode m mode video mode etc. please help! thank you!

Re: M6 Mark II Help with internal battery question

krahe — Tue, 06 Jun 2023 20:14:57 GMT

I think most devices that can handle being without power for a short time have a small, internal battery to maintain essential functions, like remembering settings and keeping the TOD clock updated. However, if that battery goes bad, then even those basic functions are going to start failing. It sounds like that might be what you're encountering. In some devices these are basically watch batteries that can be changed by opening up the device. But I have no idea what the M6 has. (Or any modern camera, for that matter.)

Re: M6 Mark II Help with internal battery question

AlanRamirez19 — Fri, 04 Aug 2023 18:03:40 GMT

Did you solve the problem? I have the issue with my m6 mark ii

Re: M6 Mark II Help with internal battery question

tadeuszstanczyk — Tue, 05 Sep 2023 00:01:29 GMT

EOS M6 mark II loses time/date every time I remove the battery. I got cost estimate for more then 400 $ from canon service support. Maybe you know another way to fix issue?

thanks

Ted

Re: M6 Mark II Help with internal battery question

tadeuszstanczyk — Tue, 05 Sep 2023 00:02:33 GMT

Hi,

EOS M6 mark II loses time/date every time I remove the battery. I got cost estimate for more then 400 $ from canon service support. Maybe you know another way to fix issue?

thanks

Ted

Re: M6 Mark II Help with internal battery question

tadeuszstanczyk — Tue, 05 Sep 2023 00:49:20 GMT

EOS M6 mark II loses time/date every time I remove the battery. I got cost estimate for more then 400 $ from canon service support. Maybe somebody knows another way to fix issue?

thanks

Re: M6 Mark II Help with internal battery question

Anonymous — Tue, 05 Sep 2023 03:49:41 GMT

I remember one forum member fixed a similar issue by resetting all camera settings and custom settings back to default, but I don't remember which camera he had. Maybe worth a shot,

Re: M6 Mark II Help with internal battery question

tadeuszstanczyk — Tue, 05 Sep 2023 22:35:38 GMT

Thanks

Ted

Re: M6 Mark II Help with internal battery question

Anonymous — Tue, 05 Sep 2023 22:45:50 GMT

Did resetting to default help your issue?

Re: M6 Mark II Help with internal battery question

tadeuszstanczyk — Wed, 06 Sep 2023 01:10:31 GMT

No,
looks like I have to find the way to charge main battery via usb-c port. To avoid to remove main battery.

thanks

Ted

Re: M6 Mark II Help with internal battery question

heuristik — Wed, 10 Jan 2024 22:58:04 GMT

Looking through this forum, and considering my own experience, I am starting to conclude that this is an M6 Mark II design flaw. I've only seen this on older cameras and devices that had a user-serviceable battery you could change. I also believe there is no store of repair parts that Canon could fix this with, so what happens is that you wind up buying a refurbished EOS M6 Mark II. It hasn't happened on my refurbished one, but ... we'll see.

Re: M6 Mark II Help with internal battery question

heuristik — Wed, 10 Jan 2024 23:00:21 GMT

That works, by the way. and it's a decent workaround -- the problem is that the batteries are not particularly large, and it's easy to wind up needing a battery change during a shoot. You /could/ use one of those power bricks, I suppose. None of these solutions are ideal.

Re: M6 Mark II Help with internal battery question

wallylp — Mon, 01 Dec 2025 21:55:31 GMT

I tried the quick battery swap out procedure until I became very proficient at it. It NEVER worked!

We are doomed to live with resetting the date and time with every battery change. Frustrating.

Re: M6 Mark II Help with internal battery question

TheHammer — Fri, 29 May 2026 07:31:16 GMT

I have the same issue

Re: M6 Mark II Help with internal battery question

NatalyaP — Sat, 30 May 2026 21:47:17 GMT

Greetings TheHammer,

The camera's internal clock uses a small built-in rechargeable date and time battery that charges automatically whenever a main battery is left inside the camera. Because your clock is resetting during a battery swap, it probably means that the internal date and time battery has dropped below its necessary voltage and can no longer hold a charge. Try inserting a charged battery pack into the camera and leaving the camera turned off for at least 24 hours to see if that gives the internal battery a full deep charge. In case the time still resets then means the internal battery has reached the end of its lifespan. We would suggest on sending the camera to our facility to have it replaced.

Canon U.S.A., Inc. has created a new online repair portal that allows you to set up service in a few simple steps. The repair portal gives you the ability to set up service for multiple pieces of equipment at once, and to receive a repair estimate in the majority of cases, depending on your model and issue. The portal also allows you to upload images or videos that will assist us in repairing your product. You can also select how you wish to be notified of the progress of your repair. The portal's service history section allows you to view all services that have been performed on any of your camera or video products since January 7, 2020.

Please follow the link below to access our online repair portal to arrange for service:

https://mycanon.usa.canon.com/signin

Instructions for Accessing and Using the Online Repair Portal.

You will need to access or create your My Canon Account.

If you already have a My Canon Account and your product is already registered, simply click on the “Get Repair Services” link on the left menu and follow the onscreen instructions to arrange for service for your product.

If you have a My Canon Account and your product is not registered, you must register your product first. Click on the “Get Repair Services” link on the left menu, then click on the “Register Product” link on the right. After your product is registered, click on the “Get Repair Service” link on the left menu and follow the onscreen instructions to arrange for service for your product.

If you do not have a My Canon Account, you will need to create one. After you create your account, click on the “Add Product” link to register your first product. After your product is registered, click on the “Get Repair Service” link on the left menu and follow the onscreen instructions to arrange for service for your product.

Once you have completed the repair request, you will have an opportunity to print a copy of the request for your records. This request form will also contain shipping instructions and an address label that you will attach to the outside of your shipping box when mailing your equipment for repair.