How Long Does a Car Battery Last in Brisbane? Meta description: In Brisbane's heat, most car batteries last 2 to 4 years. Learn why heat shortens battery life, how to make yours last longer, and when to replace it. If your car battery died after only three years, you're not unlucky. You're driving in Brisbane. Our long, hot summers are tough on batteries, and most drivers in South East Queensland get less life out of them than drivers in cooler parts of Australia. Here's what to expect, why it happens, and how to stay ahead of a flat battery. The short answer: 2 to 4 years In Brisbane and the Gold Coast, most car batteries last about 2 to 4 years . Some go longer with light use and good care. Others fail sooner, especially in cars that do lots of short trips or sit outside in the sun every day. The age on the label is only a guide. The real test is how much charge your battery can still hold and deliver. Why Brisbane heat shortens battery life A car battery works thro...