Canon PowerShot S50 User Manual page 22

Charging the Battery Pack (continued)
Battery Pack Handling Precautions
Keep the battery pack and camera terminals (
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terminals may cause a poor contact between the battery pack and camera. Polish
the terminals with a tissue or a dry cloth before charging or using the battery pack.
Do not cover the battery charger with anything, such as a tablecloth, cushion or
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blanket, when it is charging. Heat will build up internally and possibly lead to fire.
Do not charge batteries other than Battery Pack NB-2L with the supplied battery
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charger.
The battery pack continues to discharge a small amount when left in the camera
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(even with the power turned off) or battery charger. This shortens the battery life.
Remove the battery pack when the camera is not in use.
Do not allow any metal objects such as keyrings to touch the "+" and "-"
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terminals (Fig. A), as this can damage the battery pack. To carry the battery pack,
or store it during periods of disuse, always replace the terminal cover (Fig. B) or
place it in the supplied case and store it in a cool, dry place. Recharge it fully
before using it again.
Even charged battery packs continue to discharge naturally. You are advised to
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charge the battery on the day of use, or one day before, to ensure a full charge.
Since storing a fully charged battery pack for long periods of time (about 1 year)
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can shorten its lifecycle or affect performance, you are recommended to use the
battery pack in the camera until it is completely discharged and to store it at
normal temperature (23° C/ 73° F) or lower. If you do not use the battery pack
for long periods of time, charge it fully and discharge it fully in the camera at
least once a year before returning it to storage.
The camera consumes the battery charge when the power is on even when a
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function is not being used. To conserve the battery charge, be particularly
attentive in turning the camera off.
Although the battery pack's maximum operating range is 0 to 40º C (32 to 104º F),
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the optimal range is 10 to 30º C (50 to 86º F). At cold temperatures, such as those
experienced when skiing, performance will temporarily decline, reducing the
usable time before recharging.
If the usable time of a battery pack diminishes substantially even when fully
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charged, it should be replaced.
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Fig.A
) clean at all times. Dirty
Fig.B