Canon EOS 7D - Manual (Page 246)

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You can check the battery’s condition on the LCD monitor. A Battery
Pack LP-E6 has a unique serial No., and you can register multiple
battery packs to the camera. When you use this feature, you can check
the registered battery pack’s remaining capacity and operation history.
Select [Battery info.].
Under the [7] tab, select [Battery
info.], then press <0>.
X The battery info screen will appear.
3 Checking the Battery Information
Model of the battery or household power
source being used.
The battery check (p.28) displays the
remaining battery capacity in 1% increments.
Shutter count or shots taken with the current battery.
The number is reset when the battery is recharged.
Battery’s recharge performance level is
displayed in one of three levels.
(Green): Battery’s recharge
performance is fine.
(Green): Battery’s recharge performance
is slightly degraded.
(Red): Purchasing a new battery is
recommended.
Battery position
The use of a genuine Canon Battery Pack LP-E6 is recommended. If you
use any battery other than the Battery Pack LP-E6, the camera’s full
performance may not be attained or malfunction may result.
If you use two LP-E6 battery packs in the Battery Grip BG-E7, battery
information for the two battery packs will appear.
When size-AA/LR6 batteries are used in the Battery Grip BG-E7, only
the battery check display will be displayed.
If for some reason, communication with the battery is not successful, the
battery check display will show <
> on the LCD panel and in the
viewfinder. [Cannot communicate with battery] will be displayed. Just
select [OK] and you can continue shooting.