batteries

I recently acquired a new 2006 Thumb BO. I am pretty certain I have issues with my pre-amp. The batteries die too quickly. It seems like I have gone through 4 or 5 in the last month. I made sure that the last set I put into it was right out of the package and within a week they were dead...

i am thinking of replacing the stock mec preamp in my streamer lx jazzman 4 with an obp3 with all the works.. vol blend mid push pull, active passive switch.. i could always go 9v but... what the hey.... nothing but the best for my honey.. so i am thinking 18v. does anybody know if i can cramp a...