Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 594)

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Battery Grip BG-E14
BG-E14 is a battery grip you can use with two LP-E6N/LP-E6 battery packs,
or with AA/R6 batteries. It provides controls to use in vertical shooting, such
as a shutter button and Main dial. For instructions on attachment and use,
refer to the BG-E14 Instruction Manual.
Household Power Outlet Accessory
You can power the camera with a household power outlet by using the
DC Coupler DR-E6 and AC Adapter AC-E6N (each sold separately).
For instructions on attachment and use, refer to the DR-E6 and AC-E6N
instruction manuals.
o Do not use an AC adapter other than the AC-E6N.
o While the camera’s power switch is on, do not connect or disconnect the
power cord or connector or do not disconnect the DC coupler.
o After using the camera, unplug the power plug from the power outlet.
o AC Adapter Kit ACK-E6 can also be used.