go with a duralast, as for size: most batteries are the same size for passenger cars. any autoparts store or wal mart for that matter should have a guide - prepare to pay though, my brother's battery for his volvo ran over $100, it's aparently the european spec battery - go figure.
I had an Interstate battery in my '87 900 N/A for 7 years, 4 winters in Wisconsin, and 100,000 miles. It just died and I replaced it with a Die Hard Battery. I would have replaced it with another Interstate, but I had a gift card for Sears and the Interstate battery was only available from the distributor. The size for the Interstate was MT-26 if I remember correctly.
Getting the right size is simple. Just tell the salesperson your car model or look it up on a battery website.
I second the nomination for Interstate. One's been in the Saab for almost six years and still strong. The car sat unused for several months - that's very bad for car batteries - but it survived that, alternator problems, and a period of time when the car was hard to start.
I bought an Optima Red Top after many battery issues, it was a bit expensive, like $120.00, but worth it, espically if you are looking to move the battery at any time. You can mount it in any direction, upside down, etc because it is a dry cell, and it does not need a vent.
When I thought I was having battery problems (which in fact turned out to be alternator problems), I purchased a more or less generic brand battery called Deka (actually, I think it's the brand for Thrifty Auto Parts). This was a year ago - in the interim, I had two alternator issues that, over their course, caused the battery to go completely dead a half-dozen times. I trickle-charged it each time, the issues were resolved, and the battery is still in fine cranking order.
The battery type number is "26"... For Deka, the type is 526MF, which replaces a 526A. Cost was $44-.
AC-Delco batteries. The BEST. However they are not always the cheapest, but they are never the most costly. They are extremely well made IMO. I hear good things about "real" Optima batteries but the ones at Sam's Club are notoriously poor. Cheap crappy batteries suck. My new Die Hard I'm using is a POS. I have one that's frozen and another that is poor. I want to return them to Sears they are only a few months old, but Sears won't do ****. I am pissed. AC Delco all the way!
I got it for nothing, it originally replaced a side terminal battery for my 87 Cutlass Supreme (I convrted the standard GM cables with Mercedes top terminal cables) and when I sold off the Cutty, I took the battery with me. It sait for a year in the spare tire compartment of my 900 for an entire year and when I installed it a year later, didn't even need a jump, it held its charge.
I think having a BMW, Civic or Audi battery would make me more of a traitor :lol: