While summer temperatures build up the heat under the hood that damages the internal structure of an auto battery, winter cold thickens the engine oil, causing batteries to work harder to get engines to start.
As a result, the first indication of impending battery failure may be a slow cranking engine when the ignition key is turned or the start button is pushed. The headlights may also dim when the vehicle idles. Of course, the appearance of the battery light on the instrument panel is an obvious sign of battery trouble as is a non-start.
Any of these symptoms should prompt a voltmeter (multimeter) test that will provide an indication of whether the battery is sufficiently charged. Replace batteries as necessary.
TIP: The average life of a car battery is three to five years.
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