Canon Eos 5D Mark Ii Clock Battery Replacement Repair Guide

Difficulty

Easy

Steps

3

Time Required

                          5 minutes            

Sections

1

• Clock Battery
• 3 steps

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Introduction

What you need

Step 1

              Clock Battery               

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

Lift the rubber flap covering the input/output jacks.

1024

Step 2

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

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

Step 3

• 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!

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!

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

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                    Mike Seed                     

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                       USF Tampa, Team 1-6, Hickman Fall 2014                        

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Greg - Apr 4, 2016

Reply

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,

Carlos Lijeron - Mar 31, 2017

Reply

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

Tom Fewchuk - Jul 3, 2017

Reply

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?