Outdoor Battery Backup Replacement Instructions

For Replacing Outdoor Battery Backup Units and Wall Warts in Residential and Business Locations

Tools Needed

  • Phillips screwdriver
  • Pliers with rubber grips (if necessary)

An ESPI and Cyber Power Battery Backup near the Outdoor Fiber ONT.

Step 1: Locate the Outdoor Battery Backup Unit

  1. The battery backup unit is usually mounted outside the home or office near the Fiber ONT (Optical Network Terminal).
  2. Look for a Cyber Power (tan color) or Espi unit (gray) labeled as the battery backup system.
  3. Unplug the unit from the power outlet before starting the replacement process.


Step 2: Access the Battery Compartment

  1. Using a Phillips screwdriver, remove the screw securing the battery compartment door.
  2. Press the tab and pull the door open to access the battery.

 

Step 3: Remove the Old Battery

  • Espi Units:
    • The battery slides out with its attached connector—no need to disconnect cables.
  • Cyber Power Units:
    1. Unfasten the Velcro strap securing the battery.
    2. Carefully disconnect the red (positive) and black (negative) cables.
    3. If the cables are tight, use pliers with rubber grips for easier removal.
    4. Place the old battery aside and avoid touching both terminals at the same time to prevent shock.

 

Step 4: Install the New Battery

  • Espi Units:
    • Simply slide the battery attachment back into place.
  • Cyber Power Units:
    1. Connect the red (positive) cable to the red terminal.
    2. Connect the black (negative) cable to the black terminal.
    3. Push the battery fully into place and secure it with the Velcro strap.

 

Step 5: Secure the Access Door & Power On

  1. Close the battery compartment door, ensuring the tab is locked into place.
  2. Secure the door by replacing and tightening the screw.
  3. Plug the battery backup back into the outlet and check that the power lights turn on.


Proper Battery Disposal

Please do not throw away old batteries in household trash. Bring your old battery to BBT for proper disposal or follow local disposal guidelines.

For further assistance, contact BBT Customer Support at 800-592-4781.

Replacing the Wall Wart Unit

Step 1: Locate the Wall Wart Unit

  1. The Wall Wart is found inside the home or office.
  2. Follow the gray power cable from the outdoor ESPI or Cyber Power unit. It is usually mounted inside, opposite the outdoor power unit.


Step 2: Unplug & Disconnect Wires

  1. Unplug the Wall Wart from the outlet.
  2. Using a Phillips screwdriver, carefully unscrew the positive (red) and negative (black) wires.

Step 3: Connect the New Wall Wart

    1. Take the new Wall Wart Unit.
    2. Insert the red (positive) and black (negative) wires into the terminal.
    3. Tighten the screws securely but avoid over-tightening to prevent wire damage.

Step 4: Power on & Verify

    1. Plug in the new Wall Wart.
    2. Check for the green power light to confirm proper operation.


Proper Battery Disposal

Please do not throw away old batteries in household trash. Bring your old battery to BBT for proper disposal or follow local disposal guidelines.

For further assistance, contact BBT Customer Support at 800-592-4781.