Sony BC-M50, Service Manual

Page: 10 / 30

1-4 (E)
BC-M50
24
Overview
Fully charged battery skip function
If a fully charged battery pack is attached to the BC-M50, the
charging does not take place.
• This unit is a charger for Sony lithium-ion battery packs
(BP-L40/L40A/L60A/L90A) and Sony nickel metal
hydride battery packs (BP-M50/M100).
• The DC-L1 (NP-1B adaptor) and DC-L90 (BP-90A
adaptor) cannot be used to charge nickel-cadmium battery
packs.
Charging System
Charging system of lithium-ion battery packs
When this unit is used to charge two lithium-ion battery packs
at the same time, charging of one battery pack starts when the
other battery pack is 80% charged. Under the conventional
charging system, charging of one battery pack did not start
until the other was 100% charged. This unit’s new charging
system enables quicker charging of two battery packs.
Conventional charging system (charging two BP-
L40As)
Conventional charging system
Charge amount
100%
0%
Charge time
Total 300 minutes
Charging of battery pack 2 starts after battery pack 1 is 100%
charged.
Charge battery pack 1
(150 minutes) Charge battery pack 2
(150 minutes)
25
New charging system (charging two BP-L40As)
New charging system
Charging system of nickel metal hydride battery packs or a
lithium-ion battery pack and a hydride battery pack
• When the charger is used to charge two battery packs at the
same time, charging of battery pack attached to the battery
pack attachment section 2 starts after battery pack attached to
the battery pack attachment section 1 is fully charged (i.e., in
the same way as the conventional charging system described
in page 24).
• If you attach the other battery pack while one battery pack is
being charged, charging of the other battery pack does not
take place until the first battery pack is fully charged.
• The charge time for a nickel metal hydride battery pack is less
than that for a lithium-ion battery pack. To charge a nickel
metal hydride battery pack and a lithium-ion battery pack
with efficiency, it is recommended to charge them in either of
the following ways:
— Attach the nickel metal hydride battery pack to the
attachment section 1 and attach the lithium-ion battery
pack to the attachment section 2, then start charging them.
— Attach the nickel metal hydride battery pack alone to one
of the attachment sections and start charging, then attach
the lithium-ion battery pack to the other attachment
section.
Charge amount
100%
80%
0%
Charge time
Total 220 minutes
Charging of battery pack 2 starts when battery pack 1 is 80%
charged. When battery pack 2 is 80% charged, simultaneous
charging of both battery packs up to 100% starts.
This allows two battery packs to be charged in less time than
previously.
Charge battery
pack 1
(70 minutes) Charge battery
pack 2
(70 minutes) Charge battery
packs 1 and 2
at the same
time (80
minutes)