Plantronics 65358-01 Spare Battery For CS510, CS520, W410, W420, W710, W720 etc. P/N 65358-01 Product Features: You can extend the lifetime of your replacement battery with an extended warranty Voltage: 3.7V 190mAh 0.7 Wh Composition: Li-Pol Compatible Plantronics headsets include Savi 400 series, Savi 700 series, CS500 series, and CS500 XD series Taxes Buyer is responsible for paying any governmental taxes imposed on your purchases, including, but not limited to, sales, customs, use or value-added taxes.