The EnGenius DURAFON-BA is a replacement Lithium-ion battery designed for use with various EnGenius DuraFon and DuraWalkie handsets. This rechargeable battery provides up to 6 hours of talk time and 50 hours of standby time, making it suitable for maintaining continuous operation of your wireless communication devices. With an expected life cycle of 300-400 charges, approximately one year, it serves as a practical spare or replacement to extend the service life of existing handsets. This battery addresses the common issue of diminished battery performance in frequently used devices, ensuring that your communication infrastructure remains reliable and operational without requiring full handset replacement.