Application: replacement for CS50 wireless headset battery
CS50 & CS55 OEM Replacement Battery or Spare Battery for CS50 & CS55 Wireless Headsets. Also compatible with the CS55H , AWH-55, AWH-55+, CS50-USB and AWH-54.
Note: If your CS50/CS55 wireless headset never fully charges or if your fully charged headset does not have 8 hours of talk time, your CS50/CS55 battery needs to be replaced. If your headset does not turn on (you don't see a green light), then your battery has no charge.