I was looking for a top quality battery. Ultima didn't make one to fit the SRT-4 battery box. I liked the specs. on the Ultima and was told that it is superior to the Ultima and all others. I purchased the PC1200MJT model and it fit the stock battery box perfectly with no need for straps - j-bolts - special mounts. The stock heat wrap also fits over it fine. The only difference in dimentions is that the Odyssey is about 3/4" lower in height than the stock battery. The smaller models 680 and 925 would also fit but I got the 1200 as it dropped in perfectly. Even the smallest one will easily start an SRT-4. My 1200 would probably turn over a semi-truck?

 

Yeah, people use the 680 because it's almost 15 lbs lighter than the stock battery, it's like having a carbon fiber hood on I suppose, not sure what the stock hood weight is. But add on a CF hood and a few other weight savers, plus taking out the passenger seat / spare / jack at the track, you could pretty much offset the weight you add to the car sitting in it on the strip.