Reference Manual

450 Technical Notes
• Battery capacity may temporarily drop if the battery is charged at low
temperatures or used at a temperature below the temperature at
which it was charged.
• Continuing to charge the battery after it is fully charged can impair
battery performance.
• A marked drop in the time a fully charged battery retains its charge
when used at room temperature indicates that it requires replacement.
Purchase a new battery.
• Use the charger with compatible batteries only. Unplug when not in
use.
• Do not short the charger terminals. Failure to observe this precaution
could result in overheating and damage to the charger.
• Charge the battery before use. When taking photographs on important
occasions, ready a spare battery and keep it fully charged. Depending
on your location, it may be difficult to purchase replacement batteries
on short notice. Note that on cold days, the capacity of batteries tends
to decrease. Be sure the battery is fully charged before taking
photographs outside in cold weather. Keep a spare battery in a warm
place and exchange the two as necessary. Once warmed, a cold battery
may recover some of its charge.
• Recycle rechargeable batteries in accord with local regulations, being
sure to first insulate the terminals with tape.
• Do not use chargers with damage that leaves the interior exposed or
that produce unusual sounds when used.
The charging AC adapter: Observe the precautions below when using the
charging AC adapter.
• Do not move the camera during charging. Failure to observe this
precaution could in very rare instances result in the camera showing
that charging is complete when the battery is only partially charged.
Disconnect and reconnect the adapter to begin charging again.
• Do not short the adapter terminals. Failure to observe this precaution
could result in overheating and damage to the adapter.
• Unplug the adapter when it is not in use.
• Do not use adapters with damage that leaves the interior exposed or
that produce unusual sounds when used.