Canon EOS 5D Mark II Clock Battery Replacement

Written By: Mike Seed
  • Comments: 6
Canon EOS 5D Mark II Clock Battery Replacement

Difficulty

Easy

Steps

3

Time Required

5 minutes

Introduction

It is important to note that removing the memory battery will cause the camera to forget all of your settings. It would be helpful to document your settings before performing these steps. Perform these steps as basic troubleshooting, much like a soft reset.

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    • Lift the rubber flap covering the input/output jacks.

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    • Using a Phillips #000, remove the single 3.4 mm screw.

    You have gone this far, replace the battery anyway.

    I used a little blue tack to keep the screw in place

    Ron B -

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    • This step will permanently erase all user settings.

    • The memory battery can now be easily slid out of place.

    • If you are following this guide in an effort to perform a hard reset, you should now press the shutter button multiple times in order to drain any left over power, then replace the batteries and power the device back on. You have just performed a hard reset!

    In this step you also should remove the black screws to the left end right of the memory battery screw. Otherwise you can not remove the in/out port plastic covering in step 6.

    Per Feet -

Conclusion

To reassemble your device, follow these instructions in reverse order.

Author

Mike Seed

Member since: 22/09/14

2983 Reputation

4 comments

This Battery for Clock only? or CMos and Personal setting to?

there has to be something to retain all these settings once the main battery pack goes dead and or is removed from the camera?

My User 1 Pictures styles wont Save? it'll save but once i turn off My Canon Eos 5D Mark II and then back on again, my Color /Contrast/Sharpness are all Dead Center/= back to Default AGAIN? :/

Any Help here?

THANK YOU,

Greg -

I did not write the original post, but I believe once you remove this battery ALL custom changes and time will be gone. You will have to re-create them. Besides the rechargeable battery, the only one keeping track of some settings is this one.

CL

Carlos Lijeron -

Will doing this reset the shutter count in the camera? Like when you go to an external program to see how many shutter actuations there have been over the lifetime of the camera, will that number be erased?

Tom Fewchuk -

No, because some faulty behavior i removed my clock battery from my 5D MK2, but the shutter count is still the same, it would be to easy to hack a camera to be sold on a good price. :)

Vass János Szilárd -