Want to know a secret?
Want a lightweight battery you can palm in one hand? (if you don't have small hands
)
Want to pay less than $40?
Don't laugh.
I use these in my WRX that I race in SCCA RallyCross. They weigh 17lbs, 23lbs LESS than what a full group 35 battery weighs. The U1R has about 270-300CCA which is enough for a small 4 cyl engine. I've even started the car in the winter with one of these. And the best part is that at less than $40 (even better when on sale) I can go through 3 of these for the price of a new full size.
Run the light L&G battery in the summer and put the stock one on a tender for the winter.