Sony DSC-T20 - Manual (Page 114)

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On the battery charger
On the battery charger
• Do not charge any other battery pack other than
the NP-BG type battery packs in the battery
charger supplied with your camera. Batteries
other than the specified kind may leak, overheat,
or explode if you attempt to charge them, posing
a risk of injury from electrocution and burns.
• Remove the charged battery pack from the
battery charger. If you leave the charged battery
pack in the charger, battery life may be
shortened.
• When the CHARGE lamp flashes, this may
indicate a battery error or that a battery pack
other than the specified type have been inserted.
Check that the battery pack is the specified type.
If the battery pack is the specified type, remove
the battery pack, replace it with new one or
another one and check if the battery charger
operates correctly. If the battery charger
operates correctly, a battery error may have
occurred.
• If the battery charger is dirty, charging may not
be performed successfully. Clean the battery
charger with dry cloth, etc.