Using the Battery Grip
Turn the vertical grip ON/OFF switch to the ON position (see figure 11) in order to make the buttons and dials on your power grip function in the same way as those on your camera.
When shooting in the horizontal grip position, turn the vertical grip ON/OFF switch to the OFF position so that you do not accidentally use the buttons or dials on the power grip.
CAUTION
Remove the power supply from your power grip when your camera will not be used for an extended period of time.
Never attempt to disassemble or repair this device. Any malfunction or accident resulting from such action is not covered by your warranty.