How to replace the date/time battery in the EOS 5D.

Article ID: ART154017 | Date published: 06/09/2015 | Date last updated: 11/04/2015


How to replace the date/time battery in the EOS 5D.


The date/time (back-up) battery maintains the camera' s date and time. The battery' s service life is about 5 years. If the date/time is reset when the battery is replaced, replace the back-up battery with a new CR2016 lithium battery as described below.

The date/time setting will also be reset, so you must set the correct date/time.

1. Turn the <> switch to <OFF>.
2. Unscrew the battery holder screw.
  • Use a small Philips screwdriver.
  • Be careful not to lose the screw.
3. Take off the battery holder.
  • Push out the battery in direction 2.
4. Replace the battery in the battery holder.
  • Make sure the battery is in the proper +/- orientation.
5. Tighten the battery holder screw.
  • For the date/time battery, be sure to use a CR2016 lithium battery.



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