Can anyone confirm the correct size battery an A3 can hold? I have just seen 2 different Varta batteries and apparently both fit the A3 but they are different in length and power output:
Varta Silver Dynamic 585 200 080 3162 : 85Ah|800A - 317L x 175W x 175H (mm)
VARTA SILVER dynamic 577 400 078 3162 : 77Ah|780A - 278L x 175W x 190H (mm)
Which is the right one for Our A3?