How To Replace Your NBN Battery: A Quick Guide

NBN Battery

Replacing your NBN battery can seem like a daunting task, but with a little bit of knowledge and the right tools, it’s something you can manage on your own.

The NBN battery is a critical component that keeps your Fibre to the Premises (FTTP) connection alive during a power outage, ensuring that you can still make phone calls and stay online. It’s essential to know when it’s time for a battery replacement.

nbn battery replacement

Your NBN battery will indicate when it needs to be replaced—typically, a red ‘Replace Battery’ light will turn on, or an alarm will sound every 15 minutes.

This is your cue to take action. While the process of changing the battery is straightforward, you’ll want to ensure you get the correct type.

Most NBN Power Supply Units use a standard 12V 7.0 to 7.2Ah 6 cell SLA battery with F2 terminals. You can purchase this battery from a variety of retailers, or check with your service provider in case they supply them.

Before you get started, remember to have your safety gloves on and read through the instructions completely. Safety comes first, and it’s always better to be prepared.

Once you’re ready, you’ll power down your unit, disconnect the old battery, and connect the new one.

It’s similar to changing batteries in other household devices, but with the added assurance that you’re keeping your home connected.

Understanding NBN Battery Issues

When your NBN battery starts failing, it’s common to hear an alarm, and you might notice issues with your backup power during outages.

Let’s go through how to tell if you need a nbn battery replacement and what to do if the alarm won’t quiet down.

Identifying a Failing NBN Battery

Your NBN battery should last around 5 years, but when it’s time to replace it, there are a few telltale signs:

  • Beeping: This is your primary indicator. If the NBN unit beeps once every 15 minutes, it’s a sign the battery is going flat.
  • Alarm Silence Button: Pressing this will stop the beeping for 24 hours, but if it starts up again after this period, you need to look into replacing your battery.
  • Red ‘Replace Battery’ Light: On some units, a light will turn red, indicating the battery needs to be swapped out.

For specific steps on how to replace the nbn battery, ensure you check the manufacturer’s instructions or a reliable online guide.

Permanently Silencing the NBN Battery Alarm

If the beeping is driving you nuts and you’re not immediately replacing the battery, you might be tempted to silence it for good. Here’s what you can do:

  • Disconnect the Battery: If you’re sure the power supply is stable and a backup isn’t necessary, you can disconnect the battery to stop the beeping.
  • Battery Control Switch: Some units have a switch to disable the battery backup and silence the alarm.

Please note, silencing the alarm or disabling the battery won’t give you a backup during a power outage, which could affect your services. Consider a timely nbn battery replacement instead of permanently disabling this safety feature.

Replacing the NBN Battery

Replacing your NBN battery is essential to ensuring your network stays operational during a power outage. It’s a straightforward process, but it’s important to consider the costs involved.

Steps to Replace Your NBN Battery

To swap out that tired old battery in your NBN connection box, just follow these steps:

  1. Safety First: Make sure everything is powered off before you start – safety is key!
  2. Accessing the Battery: Pop open the Power Supply with the Battery Backup unit to get to the battery.
  3. Disconnecting the Old Battery: Carefully disconnect the black negative plug (marked as ‘-‘) from the old battery, followed by the red positive plug (marked as ‘+’).
  4. Removing the Battery: Push the retaining tabs outward and lift the old battery out of its home.
  5. Introducing the New Battery: Slide the new NBN battery in, ensuring those retaining tabs snap back in to secure it.
  6. Making the Connections: Reconnect the red positive plug to the ‘+’ terminal of the new battery, then hook up the black negative plug to the ‘-‘ terminal.
  7. Power Test: Power the unit back on and check for that happy green light that says all’s well.

Cost Considerations for NBN Battery Replacement

When it comes to forking out cash for a new NBN battery, think about these points:

  • Battery Type and Price: Batteries aren’t one-size-fits-all; they come with different specs and price tags.
  • DIY or Professional: Doing it yourself is cheaper, but if you’re unsure, it might be safer to call in a pro. Remember, your safety is worth more than a few bucks you might save.

For more details on the bucks you’ll be parting with, this NBN battery cost breakdown can give you an idea.

And there you have it, you’re ready to tackle that NBN battery replacement head-on!


  • David Everson

    Telecommunications & Technology enthusiast, I have worked multiple years in the telco and tech space, so have a strong passion towards delivering terrific insights.

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