Canon PowerShot S1 IS User Manual page 143

- When charging the batteries (insert and
remove the batteries two or three times
before charging)
- When charging completes in a matter of a
few minutes (the battery charger indicator
remains lit)
You may not be able to fully charge the
batteries due to their specifications right after
purchase or after long periods of non-use. If
this happens, use the batteries until their
charge is depleted before charging them
again. After doing this several times, battery
performance will be restored.
Since storing fully charged batteries for long
periods of time (about 1 year) can shorten
their lifecycle or affect performance, you are
recommended to use the batteries in the
camera until they are completely discharged
and to store them at normal temperature
(23 °C/73 °F) or less. If you do not use the
batteries for long periods of time, charge them
fully and discharge them fully in the camera at
least once a year before returning them to
storage.
If battery usage time is considerably low
despite their terminals being wiped and the
battery charger's indicator remaining lit, it is
possible that the batteries have reached the
end of their lifespan. Switch to different,
unused batteries. If you are purchasing new
batteries, look for Canon's AA-size NiMH
batteries NB4-200 (a NB-2AH four-battery
set).
Leaving batteries in the camera or charger
may damage it causing battery leakage.
Remove batteries from the camera or charger
and store in a dry cool location when not in
use.
Appendix 141