Can someone help me out here.  Batteries confuse me.

Here are the Optimas side by side. Ripped from
http://www.acdelcobatteries.com/optima.cfm
Model BCI Terminal Volts AH Amps@32o F CCA@0o F RC L W H Lbs List
D750/6 N/A SAE Auto Post 6 65 900 750 124 10 3.5 7.9 24 $122.08
D750S 34 SAE Auto Post 12 65 900 750 124 10 6.8 7.8 43 $152.38
D750U 34/78 SAE Auto & GM Side 12 65 900 750 124 10 6.8 7.8 44 $155.84

The specs are similar.  Do I get double the life (refrig run time)using two
sixes, or half or the same life, or ...

Thanks

Ty

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
Of Beckett Cantrell
Sent: Saturday, June 17, 2000 5:33 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Recomended Deep Cycle Battery Brand?

Well, I'd love to be able to recommend my company's( Exide) Orbital
Deep-Cycle, but the hacks in Marketing haven't seen fit to give it the green
light yet, and knowing them, it may be quite some time while they argue over
"Demographic Based Colour Scheme Recognition Factors and Point of Sale
Vectors" and the like. So for now, I'd go with the Optima yellow top. Dandy
little batt. If you want to get real tricky, get two Optima 6volt yellow
tops, and wire 'em in nose to tail to get 12v. Gives you a much higher C/20
use time than the 12v. and might just fit the space you've got.
Beckett