background image

 

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 

Summary of Contents for BC-900

Page 1: ...t detection to protect rechargeable batteries from over charging z Minus delta voltage dV detection for charge termination z Damaged batteries detection z Discharge mode first discharging and then charging to remove memory effect of rechargeable batteries z Refreshing old rechargeable batteries by discharging charging cycles z Test function to check the capacities of rechargeable batteries z Charg...

Page 2: ...ther 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 70...

Page 3: ...le batteries are restricted by the current setting of the first inserted rechargeable battery For instance if the first inserted rechargeable battery is set to charge at 700 mA then the second third and fourth rechargeable batteries can be only set to charging at a maximum current of 700 mA Therefore the user is advised to place the battery with the highest expected charging current in Compartment...

Page 4: ...e and Table 2 within 8 seconds after inserting the batteries Or the display will blink once to indicate the end of setting and the current cannot be changed afterward z It may take up to several days to finish the refreshing process depending on the selected discharging current z The maximum refresh current is 1000 mA and is not affected by the number of rechargeable batteries inserted TEST MODE I...

Page 5: ...nt Full stage Instantaneous Battery voltage Trickle charging current Charging time elapsed Accumulated capacity Table 6 Various displays in Refresh Mode Various displays toggled by pressing DISPLAY key Stage in Refresh mode Voltage V Current mA Time hh mm Capacity mAh Ah During discharging processes Instantaneous Battery voltage Discharging current Discharging time elapsed Capacity during discharg...

Page 6: ...ot make any repair attempts to the units Return it to its original point of purchase for repair by a qualified engineer Opening and tampering with the units may invalidate its guarantee z Do not expose the unit to extreme and sudden temperature changes this may lead to damage to the electronic parts in the unit SPECIFICATIONS Input voltage for AC DC adapter 100 240 VAC Charging current range 200 m...

Page 7: ...hnology Ltd authorized service center La Crosse Technology Ltd will pay reasonable return shipping charges to the owner of the product Your La Crosse Technology Ltd warranty covers all defects in material and workmanship with the following specified exceptions 1 damage caused by accident unreasonable use or neglect including the lack of reasonable and necessary maintenance 2 damage occurring durin...

Page 8: ...y com All rights reserved This handbook must not be reproduced in any form even in excerpts or duplicated or processed using electronic mechanical or chemical procedures without written permission of the publisher This handbook may contain mistakes and printing errors The information in this handbook is regularly checked and corrections made in the next issue We accept no liability for technical m...

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