FOR many drivers the only sign that a battery is weak is when the car refuses to start. But according to Clive McLean, leading technician at Tropical Battery, there is an obvious signal of depreciation long before a driver gets stuck with a dead battery.

“The sign that most people ignore is a hesitant start,” McLean advises.

“Simply listen to the engine when starting, once you hear that lazy sound get your battery checked with a professional.”

However, long before having to tussle with a dying battery, proper care will quite likely extend the life to its maximum — an average two and a half to three years.

In fact, a battery check is a simple but often ignored process, say Tropical Battery experts.

Representatives at the 60-year-old company actually recommend a thorough professional battery service (using load testers and hydrometers) every three months.

However a driver should always do sporadic checks as necessary.

Checking the water level is paramount, sales representative Kenneth Goulbourne advises.

Is enough water in the battery? Are the terminals corroded? Is the battery properly secured?

A positive answer to these questions means you are OK (until the next check).

* Checking the battery cells: A coin may be used to open each cell in the absence of a correct size screwdriver. “On others you have to use your hands to open depending on the configuration of the cover,” McLean reminds.

He explains that the water level should be just above the cells, “once water forms a circle then stop pouring”.

McLean recommends distilled water to top up the cells but says deionised water serves just as well.

* Corrosion at the battery terminals can prevent a car from starting due to electrical resistance. Greasing the terminals minimises corrosion without any damage to the battery, Mclean says. “Ordinary grease can be used, even petroleum jelly, just that might be a little expensive”.

In cleaning corroded terminals the ideal remedy is a solution of baking soda,” McLean says. “Pour it on the terminal it will soften the corrosion then use water to wash it off.”

And be certain the battery is firm in the tray as excessive shaking may shorten its life.

Maintenance-free batteries however negate the need for constant checks, as the sealed battery does not allow for electrolytes (deionised or distilled water) to be poured into the cells.

But Mclean cautions that drivers should be able to identify a maintenance-free battery. Don’t be fooled by a battery that merely has the access cells covered up. A maintenance free battery is completed sealed some with a small window showing the state of charge (whether it needs to be recharged or replaced).