Hi, I would like to here from anyone using the Casio Px-5s on rechargeable batteries of any kind NiMH, alkaline or whatever. I really am looking to keep my battery costs down as I am a street performer. A man in a shop showed it can work with rechargeables, just want to confirm whether anyone is regularly using it for gigs etc with rechargeables? The alternative is a Kross, but you know what happened on the kross...joke. Thanks in advance Leon Lester