294 Technical Notes
• 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 may 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).
• 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.
• 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-EL14a battery.
• Use the charger with compatible batteries only. Unplug when not in
use.
• Do not short the charger terminals. Failure to observe this precaution
could result in overheating and damage to the charger.
