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A battery can show full voltage and still fail to start an engine, which is why voltage alone tells you very little. A tester applies a load or measures conductance to find out what the battery will actually deliver under demand rather than at rest. That is why a battery replaced on a voltage reading alone is often replaced unnecessarily.
Drop testers and digital testers answer that differently. A drop tester puts a real load on and watches the voltage fall, which is direct and needs no interpretation. A digital tester measures and calculates, which is faster and does not heat the battery. Conductance testing also works on a battery too flat for a load test to give a meaningful figure.
Battery voltage has to be covered by the tester, and 6V, 12V and 24V forms are held. Start-stop vehicles need a tester that recognises AGM and EFB batteries, since testing one of those on a conventional setting gives a reading that means nothing. Polarity free drop testers remove the risk of connecting the wrong way round on a busy bench.
A printer matters where the result is shown to a customer or kept as a record. Several digital testers here carry one. Fluid testers cover serviceable batteries where the electrolyte can still be checked directly. Send the battery type and vehicle to 07754288583 on WhatsApp. A battery tester and analyser is also held that combines testing with a rescue function.
| Amperage | DC |
|---|---|
| Cable Length | 830mm (2.7ft) (Approx.) |
| Earth Connection | Insulated crocodile clip |
| Probe Length | 16mm (Approx.) |
| Voltage Range | 12V |
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