Don't forget the Sonnenschein batteries (A212 series).  Pricey, but one of
them (I forget which) will fit under the driver's seat, no modifications or
hack needed.

http://www.mhpower.com.au/Batteries/a200.html

�ric

At 01:23 PM 18/08/00 EDT, Ken Hunter wrote:
>Here is some of my cursory auxiliary battery info:
>Optima: conservative rating 65AH (probably more like 80AH) 10x7/8x9", $170,
>1yr warr. (Note:this battery is rated at 775CCA but actually tested to
>1275CCA)
>
>Exide AGM: same technology as Optima, rating 50AH (probably conservative) 10
>3/16x6 13/16x8 1/8, $102, 4yr warr. (Note: good value for AGM
>technology,great warranty for deepcycle battery)
>
>Optima 6V: rating 80AH @12V(per pair) size was n/a but basically 1/2 of a 12V
>Optima, $100each, 1yr warr. (Note: $$$but increased mounting option and more
>AH)
>
>Trojan T-105 6V: rating 225AH@12V(per pair),10 3/8x7 1/8x7
>3/16"(ea),$63.20ea, 1 yr warr.
>(Note: needs to be enclosed,vented and probably only will fit under rear
>seat. Big,heavy, and most bang for the buck)
>
>GNB1244 (gel cell): rating 44AH @12V, 7 3/4x6 3/4x6/7/16", $90ea, 1yr warr
>
>U1LDC (gel cell): rating 33AH@12V, 8 3/4x5 1/4x7 1/4", $55ea,1yr warr.(Note:
>good value in pairs for  66AH rating, smaller size for more mounting options)
>
>This info gathered by phone locally YMMV. I heard the Optima patent has
>expired which is why Exide and others are now free to market their own
>essentially the same version.
>Hope this is useful.
>
>Ken Hunter
>82 Westy 1.9D
>84 Jetta 1.5D
>89 Mitsubishi van
>