About four months ago I picked up a Roscoe LG3005, and it's been sonic heaven since. But I've noticed that the batteries don't seem to live for more than a few weeks, and it's not as if I play it hours a day. It seems I might get 15-25 hours of play per two-pack of the 9v batteries. I always turn both the amp off and the bass's volume to zero when not being played, though it stays plugged into the amp so I can pick it up and play for 10 minutes when I get a quick chance between practices.
Last night I noticed a slight breaking up of tone through the headphones, but it sounded fine through the speaker so I turned off the amp, and today the batteries are totally dead, as if there was a drain on them after I stopped playing. I've tried different brands and it doesn't seem to change anything.
Is this normal? Time to change pick-ups? Add a passive pickup? Unplug from the amp when not being played?