The lifetime of a car battery
Modern car batteries have a life span of 6 to 8 years. Each loading and unloading process unloads them and takes away parts of its original efficiency. Batteries are susceptible, especially in winter. When the outside temperature drops to zero degrees Celsius, a brand-new and fully charged battery is only 65 per cent of its capacity.
The engine, however, needs 155% of the power it needs at the temperature of 0 ° C. The colder it is, the more this balance is at the expense of the battery. The fact that it is too old or defective is therefore usually shown in winter when its capacity is no longer sufficient to actuate the starter.
By the way, your vehicle needs more energy from the battery in cold weather than in the summer: heating, ventilation, seat and rear window heating are often switched at the start. Diesel engines must be pre-annealed. The engine oil is more viscous, the temperature difference between the engine air and the ignition temperature is greater.
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Our expert advice
If your car battery fails during the first cold night, a simple hot water bottle can help. Place the hot water bottle filled with warm water directly onto the battery in the engine compartment and wait for about 20 minutes. This reduces the internal resistance of the battery and gives you enough energy for one or two additional starting attempts. In any case, remove the hot water bottle before operating the starter and then have the battery checked immediately.