Canon EOS 7D Instruction Manual page 233

Checking the Remaining Capacity of a Registered Battery Pack
You can check the remaining capacity of any battery pack (even while
not installed) and also when it was last used.
Serial No. Date last used
Remaining capacity
Deleting the Registered Battery Pack Information
1
Select [Delete battery info.].
Follow step 2 on page 231 to select [Delete battery info.], then
press <0>.
2
Select the battery pack to be deleted.
Turn the <5> dial to select the battery pack to be deleted, then
press <0>.
<X> will appear.
To delete another battery pack, repeat this procedure.
3
Press the <L> button.
The confirmation dialog will appear.
4
Select [OK].
Turn the <5> dial to select [OK], then press <0>.
The battery pack information will be deleted, and the screen in
step 1 will reappear.
3 Checking the Battery Information
Look for the serial No.
Refer to the battery's serial No. label
and look for the battery's serial No. on
the battery history screen.
You can check the respective battery
pack's remaining capacity and the
date when it was last used.
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