Lenmar Replacement Battery for Plantronics CS-50 CS50-USB CS-55 CS-60 Replaces OEM Avaya AWH-55 Plantronics 64327-01 64399-01 65358-01 PL-64399-01 Fits: Plantronics CS-50, CS50-USB, CS-55 CS-60 Replaces: Avaya AWH-55, Plantronics 64327-01, 64399-01, 65358-01, PL-64399-01 3.7V / 230mAh Lithium Polymer 1 Year Warranty Fits Plantronics PL-CS-50, PL-CS-50USB, PL-CS-55, PL-CS-60 3.7V 230mAh Lithium-Polymer 1 Year Warranty