Content

• Advice
• Warning
• What you need

Remove the battery positive cap. Check and clean the terminals.

Connect the positive end of the voltmeter to the positive terminal of the battery. Usually, the positive end of the voltmeter is red.

Connect the negative end of the voltmeter to the negative terminal of the battery.

Check the voltmeter. If the battery is in good condition, the voltage (measured per voltmeter) will be between 12.4 and 12.7 V. If the voltage is lower than 12.4 V, the battery needs to be recharged. .

• If the voltage is lower than 12.2 V, need to perform a "small current charge" or some form of slow charging for the battery. Check back when finished.
• If it exceeds 12.9 V, the voltage is too high. Turn on your car's headlights to reduce pressure. Too high a voltage can result from the generator overpowering the battery.
• Even though you have a voltmeter on hand, you should still check the battery's power supply.

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Method 2 of 3: Check battery with an electric detector

1. 

   Remove the battery positive cap.

2. 

   
   
   Connect the positive end of the probe to the positive terminal of the battery. Usually, the positive end of the detector is red.

3. 

   Connect the negative end of the probe to the negative terminal of the battery.

4. 

   Place the probe of the probe into the battery anodes. Read voltage measurements.

5. 

   
   
   Check measurements on Electrical Detectors. If the battery is in good condition, the voltage should be between 12.4 and 12.7 V. Advertising

Method 3 of 3: Check battery again by starting machine

1. 

   "Run" again the engine by turning the key switch until the engine starts, holding the key for 2 seconds. Ask someone to start the machine while you check the voltage.

2. 

   During startup, check the Electrical Detector measurements. It should not be lower than 9.6 V.
   • A voltage reading below 9.6 V means the battery has been sulfated and cannot maintain or receive current.
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Advice

• Most car batteries have a service life of 4 to 5 years. In hot climates, the battery life can be as low as 3 years. If you charge and notice that the battery is no longer charged when the car is not running, replace the battery.
• If buying a new battery, make sure that disposal of your old battery is strictly in accordance with local regulations. Usually, repair centers will take care of this for you.
• You can check and charge the battery at local auto repair centers.
• Before buying a new generator it is necessary to take a more thorough inspection of the whole system.

Warning

• Never try to short the battery terminals to avoid serious consequences such as fire, polar damage or explosion of hydrogen gas.

What you need

• Voltmeter