I've an active jazz bass that runs on two 9v batteries. I recently changed my batteries, that is on august 1st week 2020. I practice approx. 45 mins everyday. In that ime, I'll have the preamp on for 10-15 mins. My bass is sounding like this now. Should I change the batteries? I handle and maintain my bass very carefully. Is everything alright with the electronic part of my bass? Do let know guys. Thanks! Edit: I DO NOT LEAVE MY BASS PLUGGED IN. I ALWAYS UNPLUG MY BASS AFTER USING.