Smavco SM9055BPCCBL 64327-01, 64399-01, 64399-03, 653580, 65358-01, ED-PLN-6439901, PLN-6439901 Battery for Plantronics Savi Dimension: 3535 x 2107 x 437 mm Compatible part nos: 65358-01, 64399-01, 64327-01, PLN-6439901, ED-PLN-6439901, 6535801, CPP-512Q Compatible models: Plantronics Headset 64327-01