it has died several times just before we noticed the post problem.
the positive battery post has broke in half, it has happened twice this week,why on 1999 Chrysler Sebring
Wow, I can only suggest to replace the battery if you have not already. Have alternator tested to ensure proper charging of system. I have not heard of repeated post breaking issues before in one week.
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You have a serious battery issue...highly recommend that you have a shop take a look at it...it could be your alternator is overcharging but a shop will be able to verify this.