No Load Voltage, Checking

No Load Voltage, Checking

WARNING: Prior to handling or servicing batteries, read, understand and observe the Warning and Safety Measures for lead-acid batteries.

The no load voltage test determines the performance capacity of the battery.

NOTE: Battery to be tested must not have been charged or discharged for at least 2 hours before testing. Charging or discharging within two hours prior to performing test will result in erroneous results.







Special tools and auxiliary items needed







- Multimeter VAG 1526 B, VAG 1526A, Fluke 83, Volt-Amp tester Sun VAT 40 or equivalent.

CAUTION: Before beginning repairs on the electrical system
- Switch off all electrical consumers.
- Switch ignition off and remove ignition key.

- Disconnect battery.
- Wait for a minimum of two hours. Battery must not be either charged or discharged during this time.
- Check voltage between battery terminals with voltmeter.







If the battery requires charging as a result of the no load voltage test, proceed as follows:
- Wait for a minimum of two hours after charging. Battery must not be either charged or discharged during this time.
- Check voltage between battery terminals with voltmeter.
- No load voltage below 12.5 volts: Replace battery.