Replacing The Date/Time Battery - Canon EOS 50D Instruction Manual

Replacing the Date/Time Battery

The date/time (back-up) battery maintains the camera's date and time.
Its 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 be sure to set the
correct date/time.
(+) (–)
For the date/time battery, be sure to use a CR2016 lithium battery.
Set the power switch to <2>.
1
Remove the battery.
2
Take off the battery holder.
3
Replace the battery.
4
Make sure the battery is in the proper
+ – orientation.
Insert the battery holder.
5
Then load the battery and close the
cover.
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