NBN battery replacement

Have an FTTP connection? Here’s how you can maintain and replace your NBN back-up battery.

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Some Fibre to the Premises (FTTP) connections come with an optional back-up battery in case of power outages. This battery can run low on charge and will eventually need replacing. Here’s how it works.

What is an NBN back-up battery?

Your NBN equipment relies on mains power to run, meaning that your Internet will normally stop working in the event of a power failure. Some NBN connections (mostly FTTP) include a back-up battery, which provides roughly five hours of back-up power.

Standard NBN batteries are 12V 7.0 to 7.2Ah 6 cell SLA batteries that come with a two-year warranty by default.

How do I know when my NBN battery needs replacing?

Your NBN battery will inform you when it needs replacing:
  • A red light will appear next to the "Replace Battery" marker on your NBN connection box.
  • An alarm will beep every 15 minutes.
  • Four beeps per minute means less than half the charge remains.

If you want to stop the beeping, you can press and hold the "Alarm Silence" button for 3 seconds to mute it for 24 hours or 15 seconds to mute it indefinitely. Re-enable by pressing the button for the same length of time.

However, silencing the alarm doesn't change the reality that your battery likely needs replacing in the near future.

NBN back up battery

How to replace an NBN back-up battery

First, determine whether your battery is under warranty or not. The initial battery from NBN Co has a two-year warranty, so there are two options:

  • The battery is in warranty. The replacement depends on your provider. Some will credit a certain sum to your account to buy a replacement, some will reimburse you and some specify their service only runs on mains power (and don't provide replacements). Contact your provider to find out.
  • The battery is out of warranty. You will probably have to purchase your own replacement. See the list below under "Where can I buy an NBN battery?".

The actual process of replacing the battery is fairly straightforward.

    1) Turn off the electrical outlet for the NBN power supply.
    2) Disconnect the red positive plug from the battery.
    3) Push back the retaining tabs on each end of the battery and finish removing it by taking out the black negative plug.

To install a replacement battery, do the steps above in reverse.

Where can I buy an NBN battery?

While you might be able to get a battery from a number of stores, NBN Co only names five official suppliers:

  • Battery Works
  • Battery World Australia
  • Marshall Batteries
  • R&J Batteries
  • Supercheap Auto

You can choose to buy your new NBN battery online from the stores above or head in-store if you have any questions.

What do I do with my old NBN battery?

The same stores listed above can dispose of your battery, but you can also go to almost any battery recycling centres. Certain local councils across Australia also offer battery recycling, including:

  • Katherine Town Council, Northern Territory
  • Southern Downs Regional Council, Queensland
  • Huon Valley Council, Tasmania

Frequently asked questions

How long should an NBN battery last?

NBN back-up batteries are meant to last around five years if they're correctly taken care of. However, it's possible your battery may only last a couple of years and need replacing much sooner than expected.

Will the NBN work without a battery?

So long as your mains power is functioning, the NBN should work properly. The usefulness of an NBN back-up battery comes during a power outage. Without a back-up battery, your NBN will not function during a power failure in your house. This means you won't have an Internet connection until your power is back up and running.

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