How long does a car battery last?

A standard car battery often lasts around 3–6 years, but its lifespan can vary considerably depending on battery type, use, climate and charging.

Some batteries last longer, while others may need replacing sooner.

Driving patterns

Frequent short journeys may not give the battery enough time to charge properly.

Temperature

Both high and low temperatures affect battery performance. Heat can accelerate ageing, while cold reduces available starting power.

Discharging

Repeated deep discharges can shorten the lifespan of many types of lead-acid battery.

Electrical load

Lots of additional equipment can increase the load on the battery, especially when used with the engine off.

Charging system

Incorrect charging voltage or problems with the car’s charging system can affect battery lifespan.

Avoid leaving the battery discharged.
Use maintenance charging when needed if the car is rarely used.
Check that the battery connections are clean and secure.
Make sure additional equipment does not draw unnecessary current when the car is switched off.
Use a battery charger suited to the battery type.

If the battery starts showing signs of reduced starting power, it may be wise to test it before winter.