9
4 OTHER
INFO
4.1
Charging Time & Battery Capacity
The charging time is dependant on a number of conditions including the ambient
temperature and the general condition or age of the battery. However it is primarily
dependant on how many Amp-Hours need to be put back into the battery to restore full
charge, rather than the battery capacity itself. For example, a 50% discharged 45Ah
battery requires 22.5Ah to be restored, while a 50% discharged 70Ah battery requires
35Ah to be restored. (Note: Due to ineffi ciencies in the battery, approximately 10%
more is required to be delivered by the charger in practice). Based on the wide variety
of conditions, the charger can be expected to restore approximately between 1 and 3
Amp-Hours per hour of charge.
To determine if a charger is too big for your battery, use the rule of thumb that the
maximum battery charge current should be typically between 10% and 20% of the
battery Amp-Hour rating. i.e. for a 50Ah battery, the typical maximum charging current
should be less than 20% of 50Ah = 10A.
As a safety precaution, the maximum charge time has been limited to 25 hours. Please
refer to “Ready indicator (Green) Flashing” in section 3.1 for a description of what hap-
pens if the charge cycle does time out.
4.2 Calcium
Batteries
In the Calcium battery selection mode the charger can achieve a maximum
voltage of 16.5V (33V for 24V unit), the following precautions should be taken:
• Vehicle ignition must be OFF
• Vehicle lights must be OFF
• Accessories must be OFF. This includes mobile telephones, radios and sound
systems, DVD players and any other non ignition activated accessories installed.
• Be sure any caravans or boats connected to the vehicle, where the battery
is being charged also have all their electrical systems turned off. A good
precaution is to disconnect the trailer / caravan plug from the towed vehicle.
Most new vehicles can tolerate this voltage without damage to the vehicle
electrical system. To ensure that your electrical system will tolerate this
maximum charging voltage, please contact your vehicle service centre.
