the battery honestly last 6 months with that much play, its an extremely small voltage going through it. i haven't had my guitar for so long, but according to ESP if you play 2 hours a day its 12 months or something, so i suppose the 6 month estimate was pretty accurate. i play about 6 hours a day and i haven't had any problems. when you start having to turn the volume up for the guitars signal to come through the amp then its time for a new battery. no big deal really. as i said if you change your strings once a month then changing your battery once every 4 or 5 months shouldn't bother you too much at all.