Plantronics 65358-01 Battery - Replacement Battery for Plantronics 65358-01 Wireless Headsets (500mAh, 3.7V) Long Lasting High Capacity Replacement Plantronics 65358-01 Battery for Plantronics Wireless Headsets Ultra High Capacity: 500mAh Voltage: 3.7V CE Certified Factory Exceeding OEM Performance Lithium Polymer Rechargeable Battery 30-Day Money Back Guarantee. 1 Year Replacement Warranty