Nikon D500 - Manual (Page 374)

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The battery and charger : Batteries may leak or explode if improperly
handled. Observe the following precautions when handling batteries
and chargers:
• Use only batteries approved for use in this equipment.
• Do not expose the battery to flame or excessive heat.
• Keep the battery terminals clean.
• Turn the product off before replacing the battery.
• Remove the battery from the camera or charger when not in use and
replace the terminal cover. These devices draw minute amounts of
charge even when off and could draw the battery down to the point
that it will no longer function. If the battery will not be used for some
time, insert it in the camera and run it flat before removing it from the
camera for storage. The battery should be stored in a cool location
with an ambient temperature of 15 °C to 25 °C (59 °F to 77 °F; avoid hot
or extremely cold locations). Repeat this process at least once every six
months.
• Turning the camera on or off repeatedly when the battery is fully
discharged will shorten battery life. Batteries that have been fully
discharged must be charged before use.
• The internal temperature of the battery may rise while the battery is in
use. Attempting to charge the battery while the internal temperature
is elevated will impair battery performance, and the battery may not
charge or charge only partially. Wait for the battery to cool before
charging.
• Charge the battery indoors at ambient temperatures of 5 °C–35 °C
(41 °F–95 °F). Do not use the battery at ambient temperatures below
0 °C (32 °F) or above 40 °C (104 °F); failure to observe this precaution
could damage the battery or impair its performance. Capacity may be
reduced and charging times increase at battery temperatures from 0 °C
(32 °F) to 15 °C (59 °F) and from 45 °C (113 °F) to 60 °C (140 °F). The
battery will not charge if its temperature is below 0 °C (32 °F) or above
60 °C (140 °F).