[bosse92m3]

Hi guys, I keep getting the battery discharge warnings and in need of a new battery, I m thinking the 90ah 850cca agm battery.
As far as I know that Is the biggest size available now for these cars.
Bmw has them for about $670 plus programming as I am going up in battery capacity.
Is there anywhere else in Melbourne where we can get these batteries or something equivalent for a better price?
Thanks in advance!