Standard FBA38 AA Battery Tray For HX750. HX851 & HX870
The FBA-38 is an alkaline battery tray designed to provide an alternative means of powering the HX-700 & 800 series of radios when the main battery has gone flat and no charging facilities are available. The FBA-38 will take 5 x AAA cells.
Please note: this is already supplied as an accessory with the HX870E.