Sony BC-1WD Operating Instructions Manual page 18

Charging
Applicable battery packs and charging time
The time needed to charge one fully discharged battery
pack is as follows.
Battery pack charging time
Applicable Battery NP-1
Pack
Charging Time About
(at 25°C) 60 min.
Note on the battery packs
The performance of the BC-1WD/1WDCE is
guaranteed only for the applicable battery packs. Do
not charge any other types of battery packs.
Continuous charging of more than 4 battery
packs
The charge lamp of the corresponding battery pack
insertion section will light in green after a battery pack
has been fully charged. If you wish to charge
additional battery packs, remove the fully charged
battery pack and replace it with one to be charged. A
large number of battery packs can be continuously
charged through successive charging of the battery
packs.
Charging without refresh operations
Press the REFRESH OFF button and it will light.
When this button is lit, charging begins, only without
discharging first. The REFRESH OFF button goes out
and returns to the automatic refresh mode after all
battery packs inserted in battery pack insertion sections
1 through 4 have been charged once.
18
NP-1A NP-1B
About About
70 min. 90 min.
Battery pack life judgement
The capacity of the battery pack in section 4 is
measured and the results are displayed. The capacity
of battery packs in sections 1 through 3 cannot be
measured.
Press the LIFE button and it will light. Then, the
capacity of the battery pack inserted in battery pack
insertion section 4 is measured in the sequence shown
in the figure below. The criterion is that the measured
value reach 2/3 of the capacity (indicated in Ah units)
shown on the battery pack. Charging occurs in the
normal order when battery packs are also inserted in
sections 1 through 3, with the capacity of the battery
pack in section 4 measured last.
Discharge
Charge
Life judgement discharge
(Ah indication that conforms to a 0.2 c rate
discharge)
Recharge
Trickle charge
Life judgement of battery pack
NOTE
The measured value may sometimes be greater than
the capacity shown on the battery pack, however this
does not mean that there is trouble with the battery
charger.