Contact Our Battery Hotline : 0800 93 93 93

Battery Testing Equipment

Avoid a nervous breakdown!

Battery testing should form part of a regular maintenance routine. Pre-emptive battery replacement can help eliminate many of the costs and problems associated with a battery at the end of its life-cycle.

Century offers a range of battery testing equipment designed to take the guess work out of battery testing. 

You can call 0800 93 93 93 to speak to our Battery Hotline about the range of battery testers available.

Electronic Battery Testers (Digital CCA Equipment)

The electronic tester can be attached to the battery either in or out of the vehicle. The tester uses a pre loaded algorythm specifically for the battery type being tested. It compares battery impedence against a known set of values to determine the state of health of the test battery. Century Battery stockists use approved electronic battery testers suitable for a wide range of flooded, AGM flat plate and spirall cell batteries. This is a fast and convenient test typically provided free of charge by Century stockists and is a great preventative maintenance test to ensure your battery does not let you down when least expected. We strongly recommend you visit a Century stockist to verify the state of health of your battery sits well above 85% - being the critical level at which failure can occur at any time.

Voltage and Specific Gravity

Voltage (V) and Specific Gravity (SG) are measurements used to determine a battery’s state of charge. Voltage is a quick and easy way of measuring charge levels and can be performed on both Century’s Maintainable and Maintenance Free type batteries. It is conducted by connecting either a multi-meter or voltmeter and obtaining the voltage reading. When using a voltmeter or multi-meter, always connect it observing polarity.

Hydrometers measure the specific gravity of the electrolyte and indicate the density of electrolyte compared to water. As this requires access to acid reservoirs it is only suitable for use with maintainable batteries.

Testing Methods

Unloaded Testing

This is performed using either a hydrometer or voltmeter when there is no current draw on the battery. A specific gravity reading of 1.265 to 1.280 shows a full charge whereas a reading of 1.210 to 1.260 indicates that the battery should be recharged. If the stabilised open circuit reading of a sealed maintenance free battery is below 12.5V it requires recharging.

Low Load Testing

This is conducted using a multi-meter or volt meter whilst running an accessory, such as the headlights, and taking a voltage reading. The battery in a 12V system should have at least 12.4V with the lights on and if the voltage drops below this level the battery needs charging. It is good practice to apply the High Load Testing (see below) to determine the need for replacement.

High Load Testing

High Load Testing is conducted using a high rate discharge machine (load tester) on a fully charged battery. The test requires 50% of the battery’s CCA rating to be maintained for a 15-second period. The battery voltage should not drop below 9.6V throughout the 15-second test. If the battery drops below 9.6V during the test it should be replaced.

Note: The battery requires recharging after this test procedure.