I have a 2007 ford focus SE, just replaced the battery in it a few days ago, and this morning I was driving and all of a sudden, all of my dash lights turned on. The speedomitor wasn't working as well as my thermostat and it took away the amount of miles I have on my car to blank. I also have a exhaust leak if that would have anything to do with it.
You have a problem with the alternator. That might be why you thought the battery was bad. Go to a car parts store and have the alternator tested, probably free.
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