This battery is NOT interchangeable with other wireless headset batteries (i.e. Plantronics CS55 or CS50).
NOT compatible with Plantronics W740
Battery will be labeled "P/N 84479-01" but correct Plantronics part number is 86180-01
Plantronics CS540 Battery Replacement Instructions:
Slide the battery cover off and remove it from the headset.
Pull the battery out of the attachment clip.
Grasp the battery connector and disconnect from the headset.
To install a new battery:
Plug the new battery to the battery connector.
Once connected, slide the battery into place.
Slide the cover back on and push it into place.
