What is the most powerful Optima Yellow Top battery that will fit in our trucks?

 

How much are these things?

 

Blue top is the best. And you can fit two where the stock battery is.

 

asinatra is right, check on e-bay for decent prices.
Chris

 

If you don't mind my asking why is the blue top best? how/why would you use 2 and how would you set that up? What size?

Thanks.

 

You can buy dual battery wiring kits to do that. One blue would be more than enough though. The blue battery is a marine grade battery and I think they run for a good amount of money. Its red, then yellow, then blue...right?
Anyway they are great batteries but I think 1 would be enough.

 

Asinatra, to fit two in the box which size of blue or yellow top would I need? They list the D34/78 yellow top as the replacment battery for our trucks.

 

The thing with the bluetop is it has the best of the redtop and the yellowtop and marine stuff is always built to handle the most extreme conditions. As for the sizes i am very unsure only that i have seen in person a two batt setup and there is also a site (maybe two) that shows you how to do it two different ways

 

The Blue top is a deep cycle battery, designed for long term power discharge as in RV's and Marine applications, not for high power starting requirements as in cranking over the big V-8.
It will still work, but the Yellow top is better for starting your truck on a subzero morning...
check this:
OPTIMA BATTERIES