Yup, let them fix it. But they will want to give you another JD battery. Even the "won't ever happen again with this battery" replacements seem to have the same issues. (And not just Deere is having this problem...)
The best fix I have found is getting the Optima. Even though it is money out of your pocket, it is better than having to transport the tractor back for service, and loss of use, or my time repairing damage.
Our weather has been crazy /forums/images/graemlins/shocked.gif with one day 65, the next is 12, and back to 65... But no matter how cold, the tractor starts right up, and no more leaks!!!!