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  • What is the purpose of the FiberSafe™12 backup battery? >>
  • Where is the Fibersafe12 backup battery located? >>
  • What is the purpose of the iNID? >>
  • What is the purpose of the iNID Power Supply Unit (iPSU)? >>
  • How does the FiberSafe12 battery backup system work? >>
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FiberSafe™12 batteries are sealed, rechargeable lead acid batteries. They are designed to provide approximately 4 hours of battery backup power to your AT&T U-verse Voice service when electrical power to the home is interrupted. The amount of battery backup time will depend on what equipment is used during an outage as well as temperature conditions.  FiberSafe12 batteries typically last 3 to 5 years at 77°F (25°C). The battery has a special harness to make installation and removal hassle-free.

Here are some basic specifications for FiberSafe12 batteries. Please refer to our Specifications PDF for full details.
  • Equipped with a wiring harness designed for direct-connection to iPSU devices
  • Life Expectancy Standby Use: 3 to 5 years
  • Approved for shipping as nonspillable.
  • Weight:8.82 lbs (4.00 kg)
  • Dimensions: 5.94”(l) x 3.86”(w) x 3.84”(h)
    151mm(l) x 98mm(w) x 97.5mm(h)


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