Plantronics CS540 Spare/Replacement Battery - Headsets Plus Store
AC Power Adapter For Plantronics CS530a CS540a CS530 CS540 XD Wireless Headset | eBay
Plantronics Savi W730 Wireless Headset for Phone, Computer and Cell Phone (W02, WO2)
Don't even think about purchasing a Plantronics CS530 or Plantronics Savi W730 until you read this! – Merrittcomm Blog | Wired & Wireless Headsets, Productivity, Efficiency