Replacement 130mAh 66278-01, 79879-01 Battery for Plantronics C70N, CS70, CS70N, Pro, Pro+, Pro HD, Pro UC, Avaya AWH-75N Wireless Headsets Replacement for the Following Battery Model/Part Numbers: 66278-01, 79879-01. Compatible with the Following Wireless Headset Models: Avaya AWH-75N, Plantronics C70N, Plantronics CS70, Plantronics CS70N, Plantronics Voyager Pro, Plantronics Voyager Pro+, Plantronics Voyager Pro HD, Plantronics Voyager Pro UC. 3.7V 130mAh Lithium-Polymer Rechargeable Battery Pack. 3 Year Replacement Warranty. MPF Products is a Registered Trademark.