PL-CS50 for Avaya Headset Battery (250mAh, 3.7V, Lithium Polymer) - Compatible with Avaya AWH-55, Plantronics CS50, 64327-01, 64399-01, 65358-01, 653580, 6535801, CPP-512Q, ED-PLN-6439901, PL-64399-01, PLN-6439901, CS351N, CS50-USB, CS50USB, CS55, CS60, HL10, SC60, CS-60, CS-50, CS351, 6432701, CS55 Micro, PL-CS55, 64399-01/-03, 653580-1, CS-55, CS55H, CS361, PL-CS55USB, 6439901, 65358-1, Avaya AWH-55, Tenovis HSG-Link DECT 2 Replacement PL-CS50 Battery for CS50, 64327-01, 64399-01, 65358-01, 653580, 6535801, CPP-512Q, ED-PLN-6439901, PL-64399-01, PLN-6439901, CS351N, CS50-USB, CS50USB, CS55, CS60, HL10, SC60, CS-60, CS-50, CS351, 6432701, CS55 Micro, PL-CS55, 64399-01/-03, 653580-1, CS-55, CS55H, CS361, PL-CS55USB, 6439901, 65358-1, Avaya AWH-55, Tenovis HSG-Link DECT 2 Battery Capacity: 250mAh, Voltage: 3.7, Type: Lithium Polymer Lifetime Warranty On Sale for a Limited Time! Grade A Quality. High Capacity.