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Starter-current supply-CC|Basics > < Inspecting electrolyte level

Octavia Mk1

Measuring voltage under load
Measuring voltage under load
  Note
Before disconnecting the battery determine the code of radio sets fitted with anti-theft coding.
–  First of all disconnect the battery earth strap.
   
–  Measure the voltage under load with a battery tester, e.g. -V.A.G 1498-.
The load current and the minimum voltage differ according to the capacity of the battery, refer to the sticker on the tester or the table below.
  S27-0017
Battery capacity
[Ah]		Cold test current
[A]		Load current
[A]		Minimum voltage (limit value)
[V]
 
3617510010,0
40 ... 492202009,2
50 ... 60265 ... 2802009,4
61 ... 80300 ... 3803009,0
81 ... 110380 ... 5003009,5

–  If the voltage measured is below the minimum voltage, replace the battery.
Explanations regarding battery load test:
The battery voltage drops during this test as a result of the high load on the battery (a high current flows).
If the battery is O.K., the voltage value drops only as far as the minimum voltage.
If the battery is faulty or only has a weak charge, the battery voltage will drop very rapidly below the specified minimum voltage.
After completion of the test, the low voltage value is retained for a lengthy period, the voltage rises only slowly again.
If the voltage measured under a load lasting for 5 to 10 sec. is below the minimum voltage, then the battery is discharged or defective. The electrolyte density must be tested.
   

Starter-current supply-CC|Basics > < Inspecting electrolyte level