Nikon DTM-502 Series Instruction Manual page 12

• Recharge the battery pack indoors within an ambient temperature
NOTE
range 0°C to +40°C. Charging outside this temperature range will
trigger a protective circuit which prevents normal recharging.
• Keep the charging plug clean to prevent misoperation.
• If the charging indicator blinks whenever charging starts, there is an
error in the battery pack. Stop using the battery pack and contact
your dealer or a Nikon representative.
• If the battery pack is recharged within the specified ambient
temperature range and the charging indicator stays lit for 3 hours or
longer, something is wrong. Contact your dealer or a Nikon
representative. (If an ambient temperature lowers than 0°C while
recharging the battery, the charger's temperature sensor will stop the
charging operation. In such a case, it is normal for the charging
indicator to stay lit for 3 hours or longer. If the ambient temperature
increases to above 0°C, the quick charge operation will restart and the
charging will be completed within 2 hours.)
• After recharging the battery pack, do not recharge it again before using
or discharging it. This is to prevent the battery pack's performance
from degrading.
• During the quick charging or discharging operation, the battery pack
and quick charger will become warm. This is normal.
• Temperatures of less than approx. -20°C will reduce the battery
capacity. This will result in a shortened working life compared to
operation at a normal temperature.
• The battery pack left disused for a long period might not be fully
recharged. In such a case, charge and discharge the battery pack
several times to restore its full recharging potential.
• BC-80 can be charged by using the charger Q-70U/E or Q-70C, but
not be fully charged.
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