Battery Load Test
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
Information
- The acid density test provides information about the state of the battery in conjunction with the battery load test.
- A battery test device is required for the load test.
- The battery need not be removed or disconnected.
- The battery must be charged before the load test is performed.
Carrying out battery load test:
- Switch off ignition and remove ignition key.
- Observe the information in the operating instructions of the battery test device.
- Connect the clamps of the test lines to the battery terminals as described in the operating instructions of the test device.
- As the load current varies, the current must be set depending on the battery capacity (operating instructions of test device).
- Perform the battery load test in accordance with the operating instructions.
- The result of the battery load test is a voltage value that must be compared with the specified minimum voltage (limit value).
Table: Battery capacity: 80 Ah Cold test current 380A Load current 300A Minimum voltage (limit value) 9.5V - If the minimum voltage is not attained, replace battery.
Remarks on battery load test:
The battery voltage sinks during this test due to the severe load on the battery.
If the battery is in order, the voltage value only decreases to the minimum voltage.
If the battery is faulty, the battery voltage will sink very quickly below the specified minimum voltage.
After the test has taken place, the low voltage value remains over a long period of time; the voltage increases again slowly.