Your search for "plantronics cs540 battery" revealed the following:

Vintrons CS540 Replacement Battery for Plantronics CS540, C054 (86180-01, 84479-01)

84479-01, 86180-01, CS540 Battery For Plantronics CS540, C054,

Vintrons C565 Replacement Battery For Plantronics C565, CS540, 30086180-03, 212367-01 (3 pin),

84479-01, 86180-01, C054, CS540 Battery For Plantronics CS540, C054, (Pack Of 6)

Battery for Plantronics CS50, CS55, CS510, CS60, Savi 410, Savi 420, Savi 710, Savi 720, Savi Office WH300, WH350,

Battery For Plantronics CS60, HL10, 452128, 6535801, B511007,

Battery For Plantronics Poly Calisto 5300, VDL952246,

Battery For Plantronics Savi 440, Savi 740, Savi W440, Savi W745, Savi WH500,

Battery For Plantronics CS50, CS55, CS60, CS65, Savi 410, Savi 420, Savi 710, Savi 720, W710, W720,

Battery For Plantronics Discovery 640E, Discovery 650E, M50, Voyager 5200, 1704018-0944, 71468-01,

Battery For Plantronics CT14, 80639-01, 81087-01, 81087-02,

Battery For Plantronics Savi W440, Savi W740, W745, WH500, 86507-01, 204755-01, 82742-01, 84598-01,

Battery For Plantronics 7704901, 77049-01, Calisto Pro,

Battery For Plantronics 9313SW, BackBeat 500, BackBeat 505, BackBeat FIT 505, SP552631SA-1S1P-PCM,

Battery For Plantronics CT901HS,

Battery For Plantronics Savi 8210, Savi W8210, 202555-01, 211425-01,

Battery for Plantronics Voyager 5200, Voyager Legend 87300-01, Voyager Legend 87300-02,

Battery For Plantronics Savi 8220, 203035-01, 203055-01, 208769-01, 208769-02, 213199-01,

80639-01, 81087-01, 81087-02 Battery For Plantronics CT14,

Battery For Plantronics Voyager 5200, Voyager Legend 87300-01, Voyager Legend 87300-02,