TG862G/CT & TG862R: Battery Back-up Replacement

How do I determine when to replace the battery back-up in the TG862 Gateway?

The TG862 includes a battery back-up for XFINITY Voice service subscribers.  The battery back-up will allow the voice service to function in case of a power outage, but is not intended to replace the AC power for an extended period of time.  The available talk time can last up to 5 hours or provide 8 hours in standby time.  

The TG862 includes the ability to verify the battery back-up status by accessing the Web Management Interface.  To determine if a replacement battery back-up is needed for further use, the battery back-up status will appear as REPLACE.  This document describes how to determine if the battery back-up needs replacement.
 

To Determine if the Battery Back-up Needs for Replacement

1. Launch a web browser, such as Internet Explorer, Firefox, or Safari. Enter http://10.0.0.1 into the address box, and press the Enter key.  The Login page appears.
   
   NOTE: By default the LAN IP address is 10.0.0.1.  If the default address has been changed, enter the custom address in the address box.
    
2. On the Login page:
   a.   Enter admin in the Username field.
   b.   Enter password in the Password field.
   c.   Click the Login button.  The Gateway > At a Glance page appears.
   
   
    
3. On the left-hand menu, click on Hardware.  A sub-menu appears.
4. On the sub-menu, click on Battery.  The Hardware > Battery page appears.
5. On the Hardware > Battery page:
   a.   Battery installed - If  AC FAIL BATTERY LOW REPLACE, AC FAIL BATTERY REPLACE, or BATTERY REPLACE appears, replace the back-up battery.