Canon EOS D30 - Manual (Page 26)

Charging the Battery Pack
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When the DC coupler is connected to the compact power adapter, the adapter
cannot be used to charge battery packs.
Do not charge any battery packs other than model BP-511.
When the battery pack is in the camera, it discharges slightly over time even
when the camera is not used. This reduces the battery pack’s operating time.
When not using the camera, remove the battery pack and store it with its
protective cover attached. Always be sure to charge the battery pack before
using it again.
To protect battery packs and prevent loss of capacity, do not charge them
continuously for more than 24 hours.
If operating time is sharply reduced even after charging normally, the battery
pack may have exceeded its useful life. Replace it with a new battery pack.
The adapter can hold and charge two battery packs. Charging starts with the
first battery pack attached. After that battery pack is charged, the charge lamp
goes on and the adapter starts charging the second battery pack.
After charging of both battery packs is completed (both charge lamps are on),
leave both battery packs in the charger for two more hours (one hour per battery
pack) to reach a full charge.
Charging time depends on the ambient temperature, and the level to which the
battery pack is already charged.
When battery power is low, the ( cn > icon on the LCD panel blinks. Remove
the battery pack from the camera and charge it.
The battery pack can operate in temperatures from 0°C to 40°C (32°F to 104°F),
however for full operating performance, use between 10°C (50°F) and 30°C
(86°F) is recommended. In cold locations such as ski areas, battery performance
is temporarily decreased and operating time may be reduced.
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