With so many cheapo batteries coming from China this is a hard question to answer. Not that long ago you could easily expect a car battery to last at least 3 years. Now with the discounted nasties from Asia some are lucky to last 12 months. It really does come down to the old adage – you get what you pay for! In Australia you can expect to get a 3 year warranty when you spend around $120 to $150. Most of these batteries are made in Australia and are well worth the money if you are keeping the car. Something to be aware of is car batteries last less time in colder climates. As a rule of thumb you can take off about 6 months for every 5 degrees colder your suburb is in Winter.