Nikon Nikon 1 AW1 Reference Manual (en)

The Battery and Charger
Read and follow the warnings and cautions on pages xi–xiii and 211–
214 of this manual. Do not use the battery at ambient temperatures
below 0°C (32°F) or above 40°C (104°F); failure to observe this pre-
caution could damage the battery or impair its performance.
Capacity may be reduced and charging times may increase at bat-
tery temperatures from 0°C (32°F) to 10°C (50°F) and from 45°C
(113°F) to 60°C (140°F); the battery will not charge if its tempera-
ture is below 0°C (32°F) or above 60°C (140°F).
Charge the battery at ambient temperatures between 5 °C (41 °F)
and 35°C (95°F).  If the CHARGE lamp flashes quickly during charging,
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. Fail-
ure 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.
Use the charger with compatible batteries only.  Unplug when not
in use.