VOLTCRAFT BT-4 Bedienungsanleitung Seite 38

Starter test table (values in Volts)
Load voltage
Minimum starting
voltage
4. Start the engine and read the voltage value displayed on the digital
display during the starting procedure. Compare the value to the starter
test table. If the value is below the minimum start voltage stated above,
the starter draws too much current. A voltage below 9 V indicates current
being drawn at a rate that could damage the car battery. Too high
current could be caused by bad cable connections or a defective starter.
It is also possible that the car battery is too small for the engine.
5. Remove the terminal clamps after testing. First disconnect the negative
clamp and then disconnect the positive connector.
9. NOTES ON CAR BATTERIES
• The starting force (capacity) of a fully charged battery drops to below
70% in case of temperatures below zero.
• Most of the damage caused to lead acid batteries is because of
overload.
• Warmer batteries charge faster than cold batteries.
• Every battery discharges itself. The discharge current of maintenance-
free batteries is one of the lowest.
• Batteries that have not been charged for longer periods of time easily
sulfate (sulfur deposits on the plates), resulting in a loss of capacity.
• A charged, faultless battery features an idle speed voltage of 12.7 V or
more. A faulty or discharged battery features an idle speed voltage of
10.5 V or less.
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10.4 10.6 10.8 11.0 11.2 11.4 11.6 11.8
9.7 10.0 10.3 10.6 10.9 11.2 11.4 11.6