Sony BC-1WD Operating Instructions Manual page 15

Charging System
The BC-1WD/1WDCE begins discharging once the
POWER switch is turned ON. It continues to give a
booster charge until the voltage drop of –DV (see the
figures below), which occurs near the end of charging,
is detected. Trickle charging (charging at a slow rate
to normally maintain the battery in a fully charged
condition and to protect against self discharge) will be
done after all of the inserted batteries have been
charged. Trickle charging automatically stops after 24
hours of continuation. Further, the charging status
varies, as seen in the diagrams below, according to
whether you are in the auto refresh mode or the refresh
cancellation mode.
Charging in auto refresh mode
V, I
Discharge stop voltage
0
POWER
switch →ON
Check that the REFRESH
OFF button is off.
Charging in refresh cancellation mode
V, I
0
POWER
switch →ON
Press the REFRESH OFF
button and it will light
Battery voltage
Booster charge current
Rest
Discharge current
Booster charge
Start of discharge in progress
Battery voltage
Battery charge current
Booster charge
Near
in progress
end
End of booster
charging
∆V
Trickle charge current
Time
Near
Trickle charge
end
End of booster
charging
∆V
Trickle charge current
Time
Trickle charge
V : Battery voltage
I : Charging current
V : Battery voltage
I : Charging current
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