Out of sheet curiosity (really! At this point I don't intend to spend $2500 or so) I was looking at the Roland-R88 and noticed that it has a connector for an external battery that I can best describe as a kind of 4-pin XLR. According to the diagram on the side of the R-88, pin 1 is "-" and pin 4 is "+", 9-16V, 2A.
Strictly in theory, finding an external Li-ion battery that feeds something within those specs isn't difficult, but are there plugs that convert from the familiar "laptop" style DC connector to this XLR style plug? Without resorting to a soldering iron?
Roland describes it as a "Professional external battery system". To me that suggests it is not a proprietary system?
Curious,
Christine