Battery Size
Capacity (mAh)
Approximate Charge Time
180
17 min
AAA
240
22 min
500
47 min
AA
1100
103 min
1800
2 4/5 Hr
C
2000
3 1/8 Hr
2000
3 1/8 Hr
D
4000
6 ¼ Hr
9V
100-120
10 to 14 Hr
•
For AAA, AA, C, and D size batteries, it is suggested that batteries not be left in the
charger for prolonged periods to increase battery life.
•
For 9V batteries, it is suggested that batteries not be left in the charger for more than 14
hours.
OPERATING INSTRUCTIONS
Self-Test Mode
The MFJ-633 Intelligent Charger can perform a self-test to check if the charger is fully functional.
1.
Remove all batteries from the compartments and slots and unplug the jack from the charger.
2.
Connect the AC/DC adaptor to the wall socket.
3.
Push the yellow DISCHARGE button and hold it down. Then connect the jack to the charger.
Release the DISCHARGE button and all LEDs will illuminate briefly. You will see the charger
cycle through a series of tests.
4.
At the completion for the test all LEDs will briefly illuminate and the MFJ-633 will beep indicating
that the charger is ready for use. If this does not happen, the battery charger is not fully functional.
The following Modes are for AAA, AA, C & D size batteries only. To charge 9V
batteries please refer to steps 8 & 9 of the QUICK START section of this manual.
Charge Mode
The charger is designed the compartment that is filled first will be charged first. While the first
compartment filled is charging, the other compartment is in Wait Mode.
The charger can charge one or two batteries per compartment. If two batteries are placed in one
compartment, it is recommended that the batteries be of the same size and capacity. If the batteries are
different, the charger will only charge up to the smallest capacity. If one battery is empty and the other
full, the batteries must be discharged first.
For new batteries, it is recommended they be deep conditioned before initial use and charging.
1.
Insert one or two batteries per compartment.
2.
The CHARGE LED for the compartment will illuminate, indicating the batteries in that
compartment are being charged. If batteries are inserted into both compartments, the CHARGE
LED for the second compartment will flash, indicating it is in Wait Mode.
3.
When the charger detects that the batteries are almost fully charged, the READY LED illuminate
indicating that the batteries are being Boost -Charged. When the READY LED begins to flash and
the charger beeps this indicates the batteries are fully charged and can be removed from the charger.
4.
If batteries are placed in the second compartment, the CHARGE LED will illuminate after the first
compartment has completed charging. Steps 2 and 3 will repeat for the second compartment. While
the second compartment is charging, batteries in the first compartment can be removed and another
set can be inserted.
5.
The charger will switch into Trickle Charge Mode after charging is finished, so that the batteries will
always be at full capacity when removed from the charger.
Please note that batteries should only be removed when the charger is in Ready Mode. If for some
reason, the batteries need to be removed during charging or discharging, press the yellow DISCHARGE
button twice to refresh the charger.
Charging time will vary depending on the capacity and condition of the batteries. The following
formula can be used to estimate the charge time in minutes:
Charge Time = (Battery Capacity/ 800mA) / 80% X 60
Discharge Mode
This mode should be used if one of the batteries is empty and one is fully charged. It is also
recommended to use this mode occasionally in order to keep the batteries at optimal performance level.
1.
Insert one or two batteries per compartment.
2.
Press the yellow DISCHARGE button. The DISCHARGE LED on the filled compartments will
illuminate. If both compartments are filled, they will both be discharged at the same time.
3.
If only one compartment is filled, the charger will automatically switch to Charge Mode after
discharge is completed.
4.
If both compartments are filled, the compartment that is discharged first will switch into wait mode
(CHARGE LED flashes) until the other compartment is fully discharged. The charger will then
automatically switch to Charge Mode.
Note:
Press the DISCHARGE button to switch between Charge Mode and Discharge Mode at any time.
Deep Conditioning Mode
This mode can be used to rescue batteries damaged by memory effect, refresh batteries, or to break
in new batteries. This mode automatically discharges and recharges the batteries in both compartments
three times.
1.
Insert one or two batteries per compartment.
2.
Press and hold the yellow DISCHARGE button until the READY LEDs begin to flash and the
charger beeps. Then release the button.
3.
The CHARGE and DISCHARGE LEDs will illuminate as specified in Charge and Discharge Mode
instructions.
4.
During the first cycle, the READY LEDs will flash 3 times, stop, and then repeat until the cycle has
completed.
5.
During the second cycle, the READY LEDs will flash twice, stop and repeat until the cycle is
complete.
6.
During the third and final cycle, the READY LEDs will flash once, stop, and repeat until the deep
conditioning has completed.
7.
When deep conditioning of the batteries has completed, the READY LEDs flash and the CHARGE
and DISCHARGE LEDs will turn off. The batteries are now ready for use and can be removed from
the charger.
Note:
Press the DISCHARGE button to cancel Deep Conditioning Mode and switch to Charge Mode at
any time.
WARNING
•
The MFJ-633 Intelligent Battery Charger is designed for indoor use at normal room
temperature. Keep the charger away from direct sunlight, moisture, or heat.
•
Use only the AC/DC adaptor that comes with the MFJ-633.
•
This battery charger is designed to charge only Ni-Cd and Ni-MH rechargeable
batteries of size AAA, AA, C, D, and 9V. DO NOT ATTEMPT TO CHARGE ANY
OTHER TYPE OF BATTERIES WITH THIS CHARGER.
•
Do not attempt to charge leaking or corroded batteries.
•
It is normal for the batteries and adaptor to become warm when in operation.
Please ensure there is adequate space and air for the charger to operate.
