Just got my Peavey Cirrus Bolt-On a couple weeks ago and put fresh copper-tops in her (18v active). Last night during the end of our last set they went out on me. Pretty embarrassing... I've never had active electronics before, but we only played 5 gigs before this happened. Granted, we play 4 hours a night, but I remove the cord every 15min break. Is 20hrs all that standard alkalines handle in an active bass? I'm thinking maybe I should get 4 rechargeable 9Vs and swap them each gig, but they only "actually" run at 7.4V so I'm assuming it would have a negative effect on my tone. Please let me know if this is normal...I'm not looking forward to having a weekly battery "habit"