Replaced a battery and hooked it up backwards it sparked and then hooked it up the proper way and the car started the next morning the battery was dead bought a new battery same thing happened help?

You hooked up the batteries in Series whch pumped allot of current thur the circuit..which probably fried the voltage regulator and probably blew the diodes on your alternator. you can have the alternator tested at an auto parts store.. but I'd replace the voltage regulator ( if its not part of the alternator ) along wth the alternator.. gpawlak1@rochester.rr.com