Pentax OPTIO A40 - Manual (Page 20)

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• Approximate Operating Time (when the D-LI8 battery is fully
charged)
Number of recordable images: Approx. 180 (at 23°C with the LCD monitor
on and the flash used for 50% of shots)* 1
Playback time : Approx. 200 min.* 2
Movie recording time : Approx. 70 min.* 2
Sound recording time : Approx. 180 min.* 2
* 1 The number of recordable images is based on CIPA standard
measurement and may vary depending on capture mode and
shooting conditions.
* 2 Measured based on PENTAX standard and may vary depending on
the condition of use.
• Do not use the battery charger D-BC8 to charge batteries other
than D-LI8 rechargeable lithium-ion batteries, as the charger may
overheat or be damaged.
• If the battery is inserted correctly but the charging indicator fails to
light, the battery may be faulty. Replace it with a new battery.
• Storing the battery with full charge may cause battery
performance to deteriorate. Do not store batteries especially in
places of high temperature.
When the battery is left within the camera for a long time, small
amount of electrical current will flow and cause the battery to over-
discharge. This causes battery life to become short.
• In general, battery performance temporarily deteriorates as the
temperature decreases. When using the camera in a cold
environment, keep it warm by putting it in your pocket or inside
your coat. Battery performance that has deteriorated due to low
temperature will be restored when the battery is returned to room
temperature.
• Be sure to take a spare battery with you when traveling abroad or
to a cold region, or if you intend to take a lot of pictures.