Canon EOS 7D Mark II Instruction Manual page 472

3 Checking the Battery Information
Labeling Serial Numbers on Batteries
It is convenient to label all registered Battery Pack LP-E6N/LP-E6 with
their serial numbers, using commercially-available labels.
Serial number
Do not affix the label on any part other than as shown in the illustration in
step 2. Otherwise, the misplaced label may make it difficult to insert the
battery or impossible to turn on the camera.
If you use Battery Grip BG-E16 (sold separately), the label may peel off
as you repeatedly insert and remove the battery pack. If it peels off, affix
a new label.
472
1
Write the serial number on a
label.
Write the serial number displayed on
the battery history screen on a label
approx. 25 mm x 15 mm / 1.0 in. x 0.6
in. in size.
2
Take out the battery and affix the
label.
Set the power switch to <2>.
Open the battery compartment cover
and remove the battery.
Affix the label as shown in the
illustration (on the side with no
electrical contacts).
Repeat this procedure for all of your
battery packs so you can easily see
the serial number.