Nikon D4 - Manual (Page 53)

27
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D
The Battery and Charger
Read and follow the warnings and cautions on pages xiii–xv and 408–411
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 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.
Do not short the charger terminals; failure to observe this precaution
could result in overheating and damage to the charger. Charge indoors
at ambient temperatures of 5–35°C/41–95 °F. 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 (
0 351) display may show a temporary
decrease.
The battery may be hot immediately after use. Wait for the battery to
cool before recharging.
Use the charger with compatible batteries only. Unplug when not in
use.
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-EL18 battery.