Plantronics CS50 battery CS55 replacement headset rechargeable.
Replacement CS50 and CS55 headset battery pack, these 3.7-volt rechargeable batteries are suitable for many Plantronics and Avaya cordless head sets supplied at low prices direct from warehouse.

• Plantronics CS50 battery
• Plantronics CS55 battery

When you receive your new battery ensure you give it a good charge before using, in a ideal world for 12-hours, if you are also buying spare batteries then rotate the use of them of recharge every 8-weeks to keep the cells fresh.

The Plantronics CS50, CS55 replacement headset battery will fit the following.
CS50
CS55
CS361
SC60

Avaya
AWH55
AWH65
and many others

For Plantronics Avaya telephones and headsets
Battery chemistry type : Li-Polymer
Voltage: 3.7v
Capacity: 240mAh