Canon EOS-5D Instruction Manual page 23

Recharge Level Red lamp
0-50% Blinks once per second
50-75% Blinks twice per second
Blinks three times
75-90%
per second
90% or higher Lights on
Do not recharge any battery pack other than Battery Pack BP-511A, BP-
514, BP-511, or BP-512.
If the battery is left in the camera for a prolonged period without the camera
being used, a low electrical current may be discharged excessively and the
battery's service life may be affected. When not using the camera, remove
the battery and attach the protective cover to prevent shorting. Before
using the camera again, be sure to recharge the battery.
Storing the battery while fully charged may reduce its service life or
performance.
Battery Packs BP-511A, BP-514, BP-511, and BP-512 are dedicated to
Canon products. Using them with a non-Canon battery charger or product
may result in malfunction or accidents for which Canon cannot be held liable.
After the red lamp lights, continue to recharge
the battery for an hour to attain a full charge.
Even a recharged, unused battery will gradually
drain its power. Recharge the battery on the day
before or on the day you plan to use it.
By referring to the marking, you can attach the protective cover to the
battery to indicate whether the battery has been recharged or not.
After recharging the battery, detach it and unplug the power cord from
the power outlet.
The time required to recharge the battery depends on the ambient
temperature and battery's recharge level.
The battery pack can operate in temperatures from 0°C to 40°C (32°F to
104°F). However, for full operating performance, using it between 10°C
(50°F) and 30°C (86°F) is recommended. In cold locations such as ski
areas, battery performance temporarily decreases and the operating
time may be shorter.
If operating time is sharply reduced even after normal recharging, the battery
pack may have reached its service life. Replace it with a new battery.
The numbers and markings on the
battery charger correspond to the
table on the left.
Recharging the Battery
23