I have read the other threads,but decided to start one of my own.

I did get several ideas from other players about how they managed playing without AC available. In the same vein,I am attemting to asses my own needs.
My Ketron Module is 9V and SX900 is 16V input. Then,my Roland Cube Monitors are 117V. What does this mean to me as far as using a battery sound bank? At the minimum, I could use my SD40,mic,and my Microkey Air,through a small speaker.