La Crosse Technology BC-900 - Manual (Page 2)

2
CURRENT key
Press to select the amount of current to be applied (within the first 8 seconds after batteries are inserted) in different operating modes (also see “Start
charging the rechargeable batteries” below).
OPERATING MODES OF THE CHARGING UNIT
This powerful charging unit provides the following operating modes:
a.
Charge the rechargeable battery (CHARGE) – to charge the rechargeable battery, automatically switches to trickle charge after the rechargeable
battery is full.
b. Discharge then charge the rechargeable battery (DISCHARGE) – to discharge the rechargeable battery then charge it to minimize the memory
effect.
c. Refresh the rechargeable battery (REFRESH) – to refresh the rechargeable battery to its maximum capacity by charging and discharging the
rechargeable battery repeatedly until no further increase in the capacity is estimated. For old rechargeable batteries or those have not been used
for a long times, refreshing may bring the rechargeable battery back to the optimum condition.
d. Check the rechargeable battery capacity in mAh/ Ah (TEST)
CHARGE MODE
Charging at 200 mA is the default-operating mode of the charging unit.
When only one or two rechargeable batteries are charged, provided that only compartment 1 and compartment 4 are used, a charging current up to
1500 or 1800 mA may be set by the pressing the CURRENT key.
On the other hand, when charging three or four rechargeable batteries at the same time, user may select a charging current of 200, 500, 700 or 1000
mA.
The estimated time of charging by various charging current is tabulated in Table 1.
Table 1. Charging Time with various charging current
Size of
battery Battery
Capacity
Charging current
selected
Estimated charging
time
1800 ~75 min
1500 ~90 min
1000 ~2 hr 15 min
700 ~3 hr 15 min
500 ~4 hr 30 min
AA 2300 mAh
200 ~11 hr 30 min
1800 ~70 min
1500 ~80 min
1000 ~2 hr
700 ~3 hr
500 ~4 hr
AA 2000 mAh
200 ~10 hr
700 ~60 min
500 ~84 min AAA 700 mAh
200 ~3 hr 30 min
Note:
z
User shall always observe the recommended maximum charging current of the rechargeable batteries. In general, 200 mA is a recommended
charging current if rapid charging is not necessary. It is definitely safe and optimum to the rechargeable batteries.
z
When the transformer has been plugged to the power source, the version number of the charger (for example “29” ) will be displayed first. Then all
the segments will light up momentarily and the “null” sign will be shown before batteries are placed. If damaged batteries are placed to the charging
unit, the charger will also show “null” on LCD.
“null” displayed - No battery or damaged battery is
placed to the charging unit
When charging two batteries at
compartment 1 & 4 – max.
charging current: 1800 mA When charging two batteries at
compartment 1 & 2 – max.
charging current: 1000 mA
When charging four batteries –
max. charging current: 1000 mA When charging two batteries at
compartment 2 & 3 – max.
charging current: 1000 mA