Battery size

[Welshy_Pete]

I'm looking to get anther battery for my 306 hdi. But there so many out there and different sizes etc.

I was wandering what's the smallest to largest sizes battery I should be looking at getting?

I see from 63 ah 64 65 to Capacity: 74 ah car battery

Also 610 630 to CCA(SAE): 680

[tigerstyle]

Like for like is always a good start!
Presumably the ah capacity to £ ratio must be fairly linear, so decide what your lucky price point is.

[Tom]

Go on the AA website and go through there battery thing and when you put your reg in it tells you what battery your supposed to have