The KAMHUA 204755-01, 82742-01, 84598-01 Replacement Battery compatible with below Model(s):
MICROSOFT Lync 2010, Office Communicator 2007,
Plantronics 86507-01, Savi 440, Savi 740, Savi W440, Savi W440-M, Savi W740, Savi W740-M, Savi W745,

For Battery Part Number: Plantronics 204755-01, 82742-01, 84598-01;