My 2 cents on car battery

Batteries hate:
- heat
- low charge (below 80% for car battery)
- deep discharge (0%)
- hard work (under-specced batteries work harder)

So, if you want a long lasting battery
- relocate battery to the boot (if possible)
- drive everyday and more than 15 mins per trip
- trickle charge your battery when you dont drive
- get a more powerful battery than the OEM spec

Following these tips, you may get 3-6 years of battery life

First BMW battery change in 10 years, E90 325i.

Daily driven but short distances only. Car is parked in garage or underground carparks.

Brand was Varta.

The battery is the most reliable part about this car!