Battery for headsets. Compatible replacement battery, not an original battery from the manufacturer! Refer to the device and battery numbers listed to select the right battery for your device! Replacement battery suitable for: Microsoft: Lync 2010, Office Communicator 2007 Plantronics: 86507-01, Savi, Savi 440, Savi 740, Savi W440, Savi W440-M, Savi W740, Savi W740-M, Savi W745, Savi WH500 Identical to the following batteries: Plantronics: 204755-01, 82742-01, 84598-01 https://elecena.pl/product/18447898/30863-battery-for-plantronics-86507-01-li-po-140-mah 2021-05-13 https://elecena.pl/product/18447898/30863-battery-for-plantronics-86507-01-li-po-140-mah 2022-05-16