Battery ODYSSEY or OEM Subaru

The Odyssey PC680 is probably the best battery out there, if you can make it fit. I'd stay away from lithiums, you buy those when you are looking to save weight. For reliable low temperature operation, stick with a lead acid thats had decades of development.

I used straps like the first link when I had an Odyssey battery a few years back. Eventually went back to an OEM one but the straps were an easy solution

I have a half-sized lightweight battery from odyssey. I wouldn't have chosen it, but its never given me any problems and I've been using it for years at this point.

So I have the Odyssey 1200MJT in now and securely mounted with their "HDS mounting strap for 1200/1700 series batteries" from West Coast Batteries. It's mounted in the stock location in my 1994 Corrado VR6.

I use a 790cca Odyssey fmj in the summer and just bought a 590cca battery from Autozone and have a 4 year warranty and it seems to perform better than the oem battery that was killed by my bag setup.

I use a 790cca Odyssey fmj in the summer and just bought a 590cca battery from Autozone and have a 4 year warranty and it seems to perform better than the oem battery that was killed by my bag setup.

I've got two of those now (in the Group 65 monstrosity size) and they live up to the promises especially still delivering at low states of charge. I left the parking lights on my truck on for 6 hours and it still started. I'm quite happy with them and would now recommend them over the Mexican-production Optima.

Subaru batteries suck

I've had a few of the Odyssey batteries... Never lasted more than about 14-18 months before dead. Take a look at these: https://shop.antigravitybatteries.com/products/starter-batteries/automotive/ag-h6-rs/

I used Odysseys PC-680 on other cars, particularly on Evos. They weight about 15lbs and they free up spaces dramatically but the reliability is awful. I went through 3 of them once. They will start the car with a little bit of difficulty but don't try to start the car with the A/C , the radio etc because they can't.