Battery Info Page
General Miata battery recommendations:
- AVOID Westco! Short life. 2-3 years is typical life and are usually wimpy batteries in general. I've had 2; no more. Weighs 24 lbs.
- Optima Yellow top model D51R fits well w/ little modification (need longer J bolt from autoparts store - easy to get). Has 625 CCA and deep cycle, meaning that you can discharge the battery to a low voltage w/o damaging it. Great for super-stereo cars. Weighs 26 lbs. Short warranty: 1 year full replacement warranty + 1 year prorated replacement warranty. About $140 from 1st OptimaŽ Battery Sales or www.Remybattery.com.
- Optima Red top model 35 is a little fat but not hard to make fit w/ longer J bolt and hold down bracket modifications. Has 910CCA which is more than enough. Is not as good for deep cycling as the yellow top but not necessary if you don't need to drain the battery much. Weighs 33 lbs. Long warranty: 3 year full replacement warranty + 3 year prorated replacement warranty. About $140 from 1st OptimaŽ Battery Sales or www.Remybattery.com.
- Optima Red top model 75/25 is similar to the Red top model 35 but the posts are on the wrong side which requires the battery to be installed by flipping it around. The battery cables have to stretch a bit. Weighs 33 lbs. 910CCA. Warranty is 3 + 3. It is about $25 cheaper than the 35.
Optima redtop 35
I ended up with a Optima redtop model 35. It required a bit more modification than I expected to my car for it to fit, but it wasn't hard and turned out well. Starts the car very well! It masked/fixed my ignition/starter problem too.
Here is my modification procedure: