Nikon D780 DSLR Camera (Body Only) - Manual (Page 41)

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Remove the battery and disconnect the AC adapter if this product
will not be used for an extended period.
Failure to observe this precaution could result in fire or product
malfunction.
Do not fire the flash in contact with or in close proximity to the skin
or objects.
Failure to observe this precaution could result in burns or fire.
Do not leave the product where it will be exposed to extremely high
temperatures, for an extended period such as in an enclosed
automobile or in direct sunlight.
Failure to observe this precaution could result in fire or product
malfunction.
Do not look directly at the AF-assist illuminator.
Failure to observe this precaution could have adverse effects on vision.
Do not transport cameras or lenses with tripods or similar
accessories attached.
Failure to observe this precaution could result in injury or product
malfunction.