AvimaBasics Replacement Rechargeable Battery Compatible Plantronics CS50 CS50-USB CS55 CS55H CS60-USB CS351 Avaya AWH-55 Replaces Plantronics 64327-01 64399-01 64399-03 65358-01 Highest Quality Available Perfect Fit for your Plantronics or Avaya Wireless Headset System Long Lasting Lithium Polymer 240mAh 3.75v Rechargeable Battery Compatible with Plantronics Parts: Plantronics CS50 CS50-USB CS55 CS55H CS60-USB CS351 Avaya AWH-55 64327-01 64399-03 64399-01 65358-01 64399-01 1 Year Unconditional Replacement Warranty! BRAND: AvimaBasics develops high quality products. You can count on our QUALITY at an AWESOME Price with a Brand you can Trust.