BCD805W Series Manual
7
The BCD805W is a two-stage charger. A two-stage charger provides a constant current at
100% of rated output until the battery reaches its rated voltage and then switches to a “oat”
voltage. The current then reduces as necessary to complete the charge and then maintain the
battery at the oat voltage.
The charger can be connected to the battery indenitely. A two-stage charger is recommended
in most instances since it is the most versatile and can be permanently connected to attenuate
the characteristic discharge of unused batteries. A load can be put on the batteries without
altering the ability of the charger to maintain them at full charge.
100%
75%
50%
25%
0%
Bulk
(Constant Current)
Float
(Constant Volts)
Time
Two Stage Charge
Volts
Amps
Two-Stage Charging
Operation
To turn the unit on, apply power to the input. The Power LED on the top of the chassis will
illuminate. The Charging LED will then illuminate and the battery will begin charging. When
the output current drops to 10% of the continuous rating the Charging LED will turn off. The
unit will continue to provide current as necessary to maintain the battery at full charge.
To turn the unit off, turn off the source of power to the unit.