My brake light and battery lights keep coming on.
your alternator isn't charging the battery enough ,, clean and tighten all battery connections, clean the posts ,, , there have been times when I've purchased a new battery it just wasn't up to par,, take it back,, have them load check the battery , this will tell you if the battery has a bad cell in it, if it does,, have them replace the one you bought, once you have a known good battery installed in your car,, start the motor and with a multimeter test the battery posts,, Place the Positive on the + side of the battery , and the neg - lead on the battery, with the motor running, you should get a reading of 13.5-14.5 volts, if your getting less than that first reading, your alternator is shot and will need to be replaced