hard to turn over

I left something on and drained battery ,when we boosted it eventually started but very very slow to turn over ,last time I boosted same thing,almost like she aint gonna start .The battery is less than a year could alternator be at fault.Othewise car starts great all the time first try.thanks

I would take it to Autozone and have them test the alternator and the battery.Your battery maybe less than a year old but it maybe faulty...Good Luck..