Nikon D500 User Manual page 373

• If the CHARGE lamp flashes quickly (about eight times a second) during
charging, confirm that the temperature is in the correct range and then
unplug the charger and remove and reinsert the battery. If the
problem persists, cease use immediately and take battery and charger
to your retailer or a Nikon-authorized service representative.
• Do not move the charger or touch the battery during charging. Failure
to observe this precaution could in very rare instances result in the
charger showing that charging is complete when the battery is only
partially charged. Remove and reinsert the battery to begin charging
again.
• Battery capacity may temporarily drop if the battery is charged at low
temperatures or used at a temperature below the temperature at
which it was charged. If the battery is charged at a temperature below
5 °C (41 °F), the battery life indicator in the Battery info (0 309) display
may show a temporary decrease.
• Continuing to charge the battery after it is fully charged can impair
battery performance.
• A marked drop in the time a fully charged battery retains its charge
when used at room temperature indicates that it requires replacement.
Purchase a new EN-EL15 battery.
• The supplied power cable and AC wall adapter are for use with the
MH-25a only. Use the charger with compatible batteries only. Unplug
when not in use.
• Charge the battery before use. When taking photographs on
important occasions, ready a spare battery and keep it fully charged.
Depending on your location, it may be difficult to purchase
replacement batteries on short notice. Note that on cold days, the
capacity of batteries tends to decrease. Be sure the battery is fully
charged before taking photographs outside in cold weather. Keep a
spare battery in a warm place and exchange the two as necessary.
Once warmed, a cold battery may recover some of its charge.
• Used batteries are a valuable resource; recycle in accord with local
regulations.
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