In the instance of nbn™ Fibre to the Premises, nbn supplies and installs a connection box within your home or business. This box needs to be connected to the power in order to work.

How do I know if I have a backup battery?

There will be a box just for the battery. This is connected directly to the power socket and is connected to the NTD box (where you have the Ethernet sockets). The battery box will have a door on the right that can be opened to check/replace the battery.

I have a battery but it requires replacing, what do I do?

NBNCo has a section on their website where you can either pick up the battery and replace it or have someone come out and do it for you (this is not a service SpinTel offers). Alternately, you can go online and find a battery with the same specifications.

I don’t have a battery backup, but I want one. How?

You can purchase a UPS and plug your NBN box, phone and modem so you will have access to make calls etc. These are available from many computer/electrical stores (e.g., Harvey Norman, Office works, JBHIFI, Dick Smith, Jaycar).

If you wish to have the whole system upgraded, then this is possible but it will only power the NBN device, not your phone/modem (so – will not be helpful for making calls, using the net etc.).

Will my Medical or house alarm work in a power failure?

Only if you have a UPS connected to the NBN device and Modem. Failure of any of these two devices will render any Back to Base devices useless

How will I know if my battery is worn out/needs replacing?

The power supply (which has the battery) will beep every 15 mins. This can be silenced for up to 24 hours at a time by pressing the “alarm Silence” button on the device. A red light will also appear next to the ‘Replace Battery’ marker on the nbn™ connection box when it's time to replace the battery. Four beeps per minute means there’s less than half of the battery charge remaining.

If your battery was not fitted as standard with the NBN hardware, there will be no proactive notifications sent to NBNCo/SpinTel to warn us the battery needs replacing.

Battery Specifications

Battery type: 12V 7.0-7.2Ah 6 Cell VRLA Sealed Lead Acid Battery

Dimensions: 150mm (W) x 94mm (H) x 64mm (D)

Terminals: Quick Disconnect F2 6.35mm (W) x 0.81mm (T) Faston® Tab terminals.

These are to be located 8mm from the side edge of the battery casing and 12-24 mm from the top edge of the battery casing, as indicated right. Only batteries that have terminals in these exact locations will function.

Detailed battery replacement instructions are in the nbn™ Fibre User Guide that was supplied inside the nbn™ connection box enclosure or at

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