Sony BC M150 - Manual (Page 35)

5(EN)
If you attach one battery pack on the battery attachment section
with a smaller number while the other battery pack is attached
on the battery attachment section with a greater number and it
is being charged to 80% capacity (e.g., when you attach a
battery pack on battery attachment section 1 while the battery
pack attached on the battery attachment section 3 is being
charged), charging of newly attached battery pack takes place
after the first battery pack is charged to 80% capacity.
If you attach a battery pack while the BC-M150 is charging
already attached battery packs to 100% capacity, charging to
100% capacity is canceled and charging of newly attached
battery pack to 80% capacity starts.
Charging system of nickel metal hydride battery packs
Each nickel metal hydride battery pack is charged to 100%
capacity in sequence. If you attach one battery pack on the
battery attachment section with a smaller number while the
other battery pack is attached on the battery attachment section
with a greater number and it is being charged, charging of
newly attached battery pack takes place after the first battery
pack is fully charged.
Charging system of mix of lithium-ion battery packs and nickel
metal hydride battery packs
The lithium-ion battery packs are charger to 80% capacity and
the nickel metal hydride battery packs are charged to 100%
capacity according to order of battery attachment section
number. Then, the BC-M150 simultaneously charges all the
lithium-ion battery packs to 100% capacity. If you attach one
battery pack on the battery attachment section with a smaller
number while the other battery pack is attached on the battery
attachment section with a greater number and it is being
charged, charging of newly attached battery pack takes place
after charging of the first battery pack finishes.