How to look after your battery

If the battery is old, three to five years, it's worth having it checked by a battery specialist
Graham Smith

Contributing Journalist

2 min read

Before that happens it's best to start thinking about our cars and take some precautions now to avoid the winter blues later on.

The component that tends to come under the most stress in winter, and usually fails first, is the battery that powers our car.

We might think it's the engine that powers out car, but it won't be going anywhere if the battery is flat, and there are few things worse than being stuck with a car that won't start on a cold winter's morning when you're already late for work.

To check the battery start by reading the owner's manual to find out where the battery is located. On most cars it's in the engine bay, but it can also be mounted in the boot.

If the battery is old, three to five years, it's worth having it checked by a battery specialist to ensure it's up to the task come the winter months.

It's common to find the build-up of corrosion on the terminals; it's a white crystalline substance that can affect the battery's performance.

Pouring boiling water over the terminals is enough to clean the corrosion off the outside of the terminals, but to clean them properly it's necessary to disconnect them.

Before you do disconnect the terminals make sure you have the radio's security code handy as you'll need that when you reconnect the battery again. If you don't have it, get it from you dealer or manufacturer before you go any further. Without it you won't be able to use your radio.

To disconnect the terminals loosen the terminal clamps, negative first and positive last, and then wash the corrosion away from the battery terminals and the clamps with boiling water.

Dry the terminals and clamps and reconnect the leads, positive first and negative last. To help stall the build-up of corrosion apply a smear of Vaseline or other petroleum jelly over the outside of the terminal.

Do not apply the jelly to the terminal before you connect the leads as that could affect the conductivity and lower the battery's performance.

Graham Smith

Contributing Journalist

With a passion for cars dating back to his childhood and having a qualification in mechanical engineering, Graham couldn’t believe his good fortune when he was offered a job in the Engineering Department at General Motors-Holden’s in the late-1960s when the Kingswood was king and Toyota was an upstart newcomer. It was a dream come true. Over the next 20 years Graham worked in a range of test and development roles within GMH’s Experimental Engineering Department, at the Lang Lang Proving Ground, and the Engine Development Group where he predominantly worked on the six-cylinder and V8 engines. If working for Holden wasn’t exciting enough he also spent two years studying General Motors Institute in America, with work stints with the Chassis Engineering section at Pontiac, and later took up the post of Holden’s liaison engineer at Opel in Germany. But the lure of working in the media saw him become a fulltime motorsport reporter and photographer in the late-1980s following the Grand Prix trail around the world and covering major world motor racing events from bases first in Germany and then London. After returning home to Australia in the late-1980s Graham worked on numerous motoring magazines and newspapers writing about new and used cars, and issues concerning car owners. These days, Graham is CarsGuide's longest standing contributor.
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