User's Guide

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supply FSU810 directly.
• A grounded power outlet is required to insure safety and
correct operation.
1.6 Charge the battery
• Please install the battery correctly according to the
illustration above.
• The battery backup is rated for 10 hours when fully charged,
depending on the Network conditions and the frequency of
usage.
• The battery is designed for emergency use, for example,
when there is an unexpected power cut, the battery will
supply power automatically.
• Avoid total battery drain. When the electrical power is
restored, the battery will recharge itself via the power
adaptor until fully charged.
• When you charge the battery, it is advisable to keep the
FSU810 on. Do not disconnect and re-connect the power
adapter from the unit.
• As the battery is exhausted, the quality of communication
may be affected, and eventually the unit will stop working.