Canon EOS-1D Mark IV - Manual (Page 29)

Charging the Battery
Tips for Using the Battery and Charger
• Recharge the battery on the day before or on the day it is to be used.
Even during storage, a charged battery will gradually discharge and
lose its power.
• After recharging the battery, detach it and unpiug the power
cord from the power outiet.
When not using the battery and charger, attach the protective covers.
• Use the battery in an ambient temperature range of 0°C - 45°C /
32°F-113°F.
To attain best battery performance, an ambient temperature of 10°C -
30°C / 50°F - 86°F is recommended. In cold locations such as snowry
areas, battery performance and operation time may temporarily decrease.
• When not using the camera, remove the battery.
If the battery is left in the camera for a prolonged period, a small
amount of power current is released, resulting in excess discharge
and shorter battery life. Take out the battery from the camera and
attach the protective cover before storing. Storing the battery after it
is fully charged can lower the battery’s performance.
• The battery charger can also be used in foreign countries.
The battery charger is compatible with a 100 V AC to 240 V AC 50/60 Hz
power source. If necessary, attach a commercially-available plug adapter for
the respective country or region. Do not attach any portable voltage
transformer to the battery charger. Doing so can damage the battery charger.
• Check the battery performance.
While the battery is recharging, press the
<PERFORMANCE> button to check the battery’s
performance level indicated by the Charge level indicator.
■ ■■(Green) : Battery performance is fine.
■ ■ D (Green) : Battery’s recharge performance is slightly degraded
■ D D
(Red)
: Purchasing a new battery is recommended.
Canon ■*«
f
If the battery becomes exhausted quickly even after being fully
charged, the battery has reached the end of its service life.
Check the battery’s recharge performance (p.247) and purchase a new battery.
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