The Plantronics is a spare or replacement battery that is compatible with Plantronics CS540 wireless headset. This is a genuine Plantronics OEM (not after market) Replacement Battery or Spare Battery.

Features:

• Li-Ion Polymer Battery
• Provides up to 7 hours talk time on a full charge
• Full charge takes 3 hours (charge approximately 20 minutes prior to the first use)
• Approximately 0.75" x 1/2" thick