Roland cube rx battery problem

[hotfoot]

Hi, recently bought the bass cube rx unit and really like it, use it for rehearsals and small gigs.
I have found that I have to change the batteries after only a short time, the sound starts warping all over the place as if someone is playing with the effects knobs. As soon as I replace the batteries it goes back to normal.
I always use it the power unit plugged in and with batteries in place, should I remove the batteries, or use rechargebles or what, anyone else had this happen?

[goran]

I have been using mine with adapter for 99% of time. I put the batteries in only if I intend to use it at places where there is no wall socket. In that rare occasions, batteries lasted me 10+ hours without any sound degradation. Bottom line, always remove batteries when you're on power adapter.

Hope this helps!