Canon EOS Rebel T6i W Instruction Manual page 370

Troubleshooting Guide
[Battery communication error. Does this battery/do these
batteries display the Canon logo?] is displayed.
Do not use any battery pack other than a genuine Battery Pack LP-

E17.
Remove and install the battery again (p.36).

If the battery contacts are dirty, use a soft cloth to clean them.

The battery becomes exhausted quickly.
Use a fully-charged battery pack (p.34).

The battery performance may have degraded. See [53: Battery info.]

to check the battery's recharge performance level (p.348). If the
battery performance is poor, replace the battery pack with a new one.
The rechargeable battery pack performance will degrade over

repeated use. Purchase a new one.
The number of possible shots will decrease with any of the following

operations:
• Pressing the shutter button halfway for a prolonged period.
• Activating the AF frequently without taking a picture.
• Using the lens's Image Stabilizer.
• Using the LCD monitor frequently.
• Continuing Live View shooting or movie shooting for a prolonged
period.
• The Eye-Fi card's communication function is operating.
The camera turns off by itself.
Auto power off is in effect. If you do not want auto power off to take

effect, set [52: Auto power off] to [Disable] (p.257).
Even if [52: Auto power off] is set to [Disable], the LCD monitor will

still turn off after the camera is left idle for 30 min. (The camera's
power does not turn off.) Press the <T> button to turn on the LCD
monitor.
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