Canon PowerShot SD870IS User Manual page 209

Appendix
1207
You may be able to check the charge state depending upon how the
terminal cover is attached (Fig. C, D).
Fig. C Fig. D
Charged Battery Spent Battery
Attach it so the • Attach it the opposite
is visible way to Fig. C.
• You are recommended to use it in the camera until it is
depleted and to store it in an indoor location with low relative
humidity and between the temperatures of 0 - 30 °C (32 - 86
°F).
Storing a fully charged battery for long periods of time (about one
year) may shorten its life cycle or affect its performance. If you do
not use the battery for long periods of time, charge it fully and
discharge it in the camera about once a year before returning it to
storage.
• Since this is a lithium-ion battery, you need not discharge it
before recharging.
• It takes approximately 2 hours 5 minutes to fully charge the
battery from a depleted state (based on Carton's testing
standards).
• .Charging it within a temperature range of 5 -40 °C (41 - 104 °F)
is recommended.
Charge times may vary according to the ambient temperature and
the battery's charge state.
• You are advised to charge the battery on the day of use, or one
day before, to ensure a full charge.
• Even charged batteries continue to discharge naturally.
• If the performance of the battery diminishes substantially even
when it is fully charged, its life has been exceeded and it
should be replaced.