DRAPER 70551 12/24V Battery Starter/Charger, 500A

User Manual - Page 14

For 70551.

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9.1 BATTERY INFORMATION
Before proceeding with the charging of the battery ensure that the battery to be charged is within
the recommended amperage range for the charger.
Always follow your battery manufacturers instructions during charging.
If the battery amperage rating is not stated or you are unsure about the rating please see the table
below for some typical readings.
Engine
Capacity
<1300cc
5 - 15Ah 15 - 30Ah 35 - 45Ah - 60 - 110Ah
>1300cc - - 45 - 65Ah 45 - 65Ah 60 - 110Ah
Diesel - - 60 - 90Ah 60 - 90Ah 60 - 110Ah
9.2 CHARGING TIMES
The charging time depends on the batteries charge condition. A partially charged battery will take
less time to charge than a fully discharged battery. The approximate charging time for a battery
can be calculated using the following equation:-
Capacity in Ah (battery)
Charging time/hours =
Charger output (Amps)
For example, a 45Ah battery would require approximately 11 hours to charge from a 4.2A battery
charger. As your battery nears fully charged status, the ammeter indication needle will return to
near the ‘0’ position in the green area of the ammeter display to indicate the battery is fully
charged.
Charge a mid-sized car battery with a typical charge amp of around 4-8 amperes will take about
10-24 hours to charge it fully. To charge your battery to be able to start your car, it would take
around 2-4 hours.
Charging the car battery slow is the best to keep a long life for your car battery
You can charge your car battery fast, but it may cause damages to your car battery.
9. OPERATION AND USE
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