The Spectralink 84 Series Standard Battery (1520-37214-001) is a standard battery for the Spectralink 8400 and 8450 WiFi Phone. It offers up to 8 hours talk-time and a standby time of up to 80 hours.
Increase your talk-time to up to 12 hours and standby to up to 120 hours with a Spectralink 84 Series Extended Battery