7
8 Stages of Charging
With the microprocessor-controlled charging steps of your Pro-User IBC charger, you are able to recharge
your battery to almost 100 % of its original capacity. To ensure that your battery is kept in an optimum
condition, your Pro-User charger can be attached permanently even for longer periods. The correct
charging step is automatically selected by your Pro-User charger:
Step 1: Check
Checks the battery voltage to make sure battery connections are good and the battery is in a stable
condition before beginning the charging process.
Step 2: Recovery
Initializes a recovery process, if needed, for deeply discharged or sulphated batteries by pulsing small
amounts of current.
Step 3: Soft Start
A low charging rate protects deeply discharged or sulphated batteries.
Step 4-5: Bulk
The “Bulk” charging step uses both a high and medium charging rate until about 80% of the battery
capacity.
Step 5: Absorption
The battery charger will deliver small amounts of current to provide a safe, efficient charge and limit
battery gassing.
Step 6 & 7: Maintenance 1 & Maintenance 2
The battery is fully charged and ready to use (the battery icon stops flashing). In this step, the charger
will only deliver enough current to keep the battery full. The battery voltage is continuously monitored
to check if a maintenance charge should be initiated: If the terminal voltage falls below 6.4V(6V) or
12.8V(12V), the charger will start a maintenance cycle until voltage reaches 6.8V(6V) or 13.6V(12V).
Switching between “trickle-charging” and “maintenance-charging” is repeated indefinitely to keep the
battery fully charged without the risk of overcharging. The battery charger can be left connected to the
battery for an unlimited amount of time.
