I've posted some info on how to use those D cell battery holders inside a CY-2562/PRC-25 case and attach it to a PRC-77 without using duct tape and glue. Also included some battery connector info. k4che http://k4che.com/PRC-77%20Battery/PRC-77%20Battery.htm http://k4che.com/PRC-77%20Battery/PRC-77%20Battery.htm