INTERSTATE TEL1066 CORDLESS TELEPHONE REPLACEMENT BATTERY 2.4V 750MAH NIMH: Fits: Plantronics 80639-01, Plantronics 81087-01, Plantronics CT14 2.4V 750MAH NIMH Fits: Plantronics 80639-01, Plantronics 81087-01, Plantronics CT14