Canon Powershot A40 User Manual page 23

¡When the camera's indicator flashes green, do not turn
off the power or open the battery cover. The camera is
writing, reading, erasing or transmitting an image to or
from the CF card.
¡We recommend that you use the optional AC Adapter
Kit ACK600 to power the camera during long usage
sessions (p. 146).
¡The optional battery charger kit lets you use recharge-
able NiMH batteries to power the camera (p. 144).
¡For important information, see "Battery Performance"
(p. 164).
¡For information about the Battery and Charger Kit and
AA-size rechargeable NiMH batteries, see the System
Map (separate from this guide).
Proper Battery Handling
¡Use AA-size alkaline or Canon AA-size NiMH batteries only.
For information on handling the AA-size rechargeable NiMH
batteries, see "Using the Optional Battery Kits" (p. 144).
¡Never use manganese or lithium batteries, as these battery
types may overheat in the camera.
¡Since the performance of alkaline batteries may differ
according to brand, the operating time of the batteries you
purchase may not be as long as the batteries that came with
the camera.
¡Camera operating time may shorten at low temperatures when
alkaline batteries are used. Also due to their specifications,
alkaline batteries may expire faster than NiMH batteries. If you
are using the camera in cold areas or for a long time, we
recommend using Canon AA-size NiMH Battery Kit (a four-
piece set).
¡While it is possible to use AA-size nickel-cadmium batteries,
performance is unreliable and their use is not recommended.
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