When we attend a vehicle with a flat battery, or suspected flat battery we don’t just jump start the vehicle and send you on your way. We look for the root cause and make sure We resolve it.
Bad cell or Replace battery
A car battery is made of several separate two volt batteries – called cells – which are joined together. Battery cells cannot be replaced or repaired individually.
The battery needs replacing as the tester has identified that the battery has a defective cell or the tester has identified that the battery is no longer able to provide the required current and needs replacing.
Ideally the battery should be fully bench charged and retested. A weak battery is slow to accept a charge, but a good battery will accept a charge more readily.
If the readings with the voltmeter and amp-clamp are within specification for the vehicle the original battery test will be repeated to make sure the battery did not just fail the initial test through lack of voltage.