I like the HP2 but the power button is truly the wrong type. So easy to bump the on/off button while the unit is in a carry case. I have wasted soooo many batteries because of this type of on/off button. As well the 9 volt battery connection is cheap-as-hell and ready to fall apart. You could use a battery connection like one found in smoke detectors. Then it's easy and I don't risk breaking the tiny wires in the middle of a show.