When Do You Need To Change Your Car Battery

2 signs to look out for

The engine cranks, yet won’t start

This is most likely to be the result of a flat battery; it could likewise be an engine ignition or fuel system issue. It’s also plausible that loosened or rusty battery terminals have produced an unstable link which is hindering electricity from the battery getting to the starter motor. Maybe that the battery is outdated, or that lights or devices were left activated, or it might be the result of a component of the automobile’s charging system, such as the generator, failing.

The engine will not crank 

This symptom points directly at a flat battery– just as with the above circumstance, there could be a variety of causes. Battery damage as a result might indicate it requires a car battery replacement too.

Testing your battery

Capacity test

Can the battery capacity be tested? Yes, the battery capability is usually determined in CCA or Cold Cranking Amps. Lots of vehicle repair shops can check your battery with an unique tester. The battery tester can determine the real CCA and compare it to the new battery CCA rating. A battery tester can likewise test the alternator and the charging system. 

Numerous vehicle dealerships and repair shops typically provide a cost-free battery examination as a part of a seasonal promotion. After the test, you might get a printout showing the battery CCA score and the gauged CCA. The hard copy will suggest if the battery ought to be replaced or just need to be charged.

Voltage test

Can you examine a battery with a voltmeter? The battery voltage is a great indication of the level of charge of the battery. A totally charged battery ought to read 12.6 volts or even more with the engine off. Evaluating the capacity of the battery with a voltmeter is more difficult. One way is to examine the voltage of the battery under load, for example, with the fronts lights on. If the battery voltage with the engine off and fronts lights on decreases from 12.6 volts to less than 11 volts in a number of minutes, the battery is weak.

Boosting your battery

How to boost an automobile when the battery is short on charge? To boost a vehicle, you will need a portable booster or jumper cables to boost from another vehicle. Your proprietor’s handbook has the correct guidelines. Take care, if the booster cables are attached to wrong terminals, it might trigger a huge spark and some fuses and various other electrical parts could be fried.

Rule of thumb

The guideline is basic for battery replacement: You have roughly four years prior to the battery will theoretically begin its slide from chemical powerhouse to chemical paperweight. At the four-year mark, start looking for signs (which we’ll talk about in a little bit) and be prepared to act.


As a mechanical engineer turned blogger, Charlie provides readers with a technical, yet accessible look into the world of automotive engineering and design. His insightful posts make complex car technologies understandable.