I replaced my aged 12v battery this weekend and opted for the Odyssey PC545 dry cell. The current battery was installed by the previous owner and weighs 25lbs. The PC545 weighs in at only 12lbs. I had to add 3 inches of support below the battery to raise it to the stock height and the reduced width allowed a nice place to carry some spare oil.
I used a layer of cardboard around a hard foam block I found. I may change this to something more permanent but it appears to be holding up well. Also, it only weighs a few ounces. Others have used pieces of 2X4. You need to add roughly 3 inches and I would think you could use any material/substance that can support the weight of the battery and you feel confortable that it can survive the climate of the engine compartment.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.