Battery back up for router. NOT UPS

[Paul Drawmer]

Now we have been foisted with BT voice, I need a back up for the HomeHub to maintain the land line and

It doesn't need to be UPS, as there's nothing critical about a delay in getting the power back on.

I already have an inverter which will provide enough power at 240 to plug the hub into, all I need is a battery.
I also have an old battery monitor/charger that will maintain/charge the battery when not in use.

I thought that maybe if I just bought a new battery to fit my car, then I'd have spare for that as well.

Thinking of incorporating the whole thing in a box which I'd keep in the garage, hooked up for the maintenance charger, and sitting on a trolley to wheel in to where I can plug the Home Hub into.

Any suggestions or tips to make it work better, is a car battery OK for this type of application?

[CLX]

I have exactly this set up, but I bought a golf cart battery instead. Not as powerful as a car battery, but doesn't need to be. Also smaller, so takes up less space. Also, car batteries aren't designed to be charged up and then run down. Leisure batteries, which is what the golf trolley battery is, are.

You can also buy 'power stations' from Amazon, which does everything in one box, but they're quite expensive

[Smurfsarepeopletoo]

I work for a company that now installs digital phones, and we get people stressing about losing the phone lines, until I point out that there actual phone requires a power supply, so if the power goes out, it wont work anyway.

Just checking that you dont have phones that require power to work.

[S6PNJ]

Paul Drawmer said:

Now we have been foisted with BT voice, I need a back up for the HomeHub to maintain the land line and

It doesn't need to be UPS,..

Do you know your SIP (VOIP) account settings? If so, download Zoiper (or another VOIP app) for your mobile phone and use your data allowance to keep your 'home' phone available.

[shtu]

Paul Drawmer said:

I already have an inverter which will provide enough power at 240 to plug the hub into, all I need is a battery.

This is very inefficient - stepping 12v to 240v back to (about) 12v again. It'll work, but expect mediocre run time.

Older hub models worked just fine with 12vdc, maybe try that first.

[Paul Drawmer]

S6PNJ said:

Do you know your SIP (VOIP) account settings? If so, download Zoiper (or another VOIP app) for your mobile phone and use your data allowance to keep your 'home' phone available.

Except that the mobile coverage here is zip. I have to have wifi calling to work with the mobile phone.

[Paul Drawmer]

shtu said:

This is very inefficient - stepping 12v to 240v back to (about) 12v again. It'll work, but expect mediocre run time.

Older hub models worked just fine with 12vdc, maybe try that first.

Doh! I'll look at that, thank you.

[Paul Drawmer]

Smurfsarepeopletoo said:

I work for a company that now installs digital phones, and we get people stressing about losing the phone lines, until I point out that there actual phone requires a power supply, so if the power goes out, it wont work anyway.

Just checking that you dont have phones that require power to work.

Fair enough, but the main phone has a set of AAs and does not use an external psu.

[Tony1963]

Smurfsarepeopletoo said:

I work for a company that now installs digital phones, and we get people stressing about losing the phone lines, until I point out that there actual phone requires a power supply, so if the power goes out, it wont work anyway.

Just checking that you dont have phones that require power to work.

I think I’m correct in saying that our old fashion corded phone that we keep ‘just in case’ will work in a power outage, as long as the exchange is still operating.

We’re in a similar position to the OP in that the mobile signal is unreliable here. It can flick from one bar of 5G to two of 4G to 3G to E, all in under thirty seconds, and not allow a voice call to connect for a large part of the day.

[camel_landy]

Tony1963 said:

I think I’m correct in saying that our old fashion corded phone that we keep ‘just in case’ will work in a power outage, as long as the exchange is still operating.

Not any more... BT is gradually rolling out a VOIP solution, where your voice is delivered via your BT Home Hub.

Without power, it's not going to work.

M

[eliot]

camel_landy said:

Tony1963 said:

I think I’m correct in saying that our old fashion corded phone that we keep ‘just in case’ will work in a power outage, as long as the exchange is still operating.

Not any more... BT is gradually rolling out a VOIP solution, where your voice is delivered via your BT Home Hub.

Without power, it's not going to work.

M

Still has an analogue phone port on the back of it surely? My Vodaphone fttp box has a voip line and an analogue phone port for the phones.

to the o/p - given the tiny draw of a router, a proper ups wouldn’t cost very much at all and of course you can plug any cordless phone charger bases into it too

[Captain_Morgan]

Paul Drawmer said:

Smurfsarepeopletoo said:

I work for a company that now installs digital phones, and we get people stressing about losing the phone lines, until I point out that there actual phone requires a power supply, so if the power goes out, it wont work anyway.

Just checking that you dont have phones that require power to work.

Fair enough, but the main phone has a set of AAs and does not use an external psu.

Just for clarity, the “main” phone is wired directly to the isp “box” & is not a dect base wired to the isp “box” with a wireless handset?

Also note you can get dc to dc converters that will take your 12v dc to whatever voltage you need, obviously select appropriately amp rated devices & fuse appropriately both the supply & output.

[Paul Drawmer]

Captain_Morgan said:

Just for clarity, the “main” phone is wired directly to the isp “box” & is not a dect base wired to the isp “box” with a wireless handset?

Also note you can get dc to dc converters that will take your 12v dc to whatever voltage you need, obviously select appropriately amp rated devices & fuse appropriately both the supply & output.

The phone is a corded phone plugged into the socket on the back of the Home Hub. (Actually the old internal hardwired system is now plugged into the back of the HH, we had to make the change when we were changed over to digital voice) It all works fine. We also have a wifi BT phone which weirdly gives us two landlines - we can make separate calls on each simultaneously, with the same number.

[camel_landy]

eliot said:

Still has an analogue phone port on the back of it surely?

It does but without power to the HH, it's not going any further!!

M

[Mr Pointy]

Paul Drawmer said:

shtu said:

This is very inefficient - stepping 12v to 240v back to (about) 12v again. It'll work, but expect mediocre run time.

Older hub models worked just fine with 12vdc, maybe try that first.

Doh! I'll look at that, thank you.

Which model or version is your Home Hub?

[Captain_Morgan]

camel_landy said:

eliot said:

Still has an analogue phone port on the back of it surely?

It does but without power to the HH, it's not going any further!!

M

That’s why the he is looking to power his HH via a car battery isn’t it…

[camel_landy]

Captain_Morgan said:

camel_landy said:

eliot said:

Still has an analogue phone port on the back of it surely?

It does but without power to the HH, it's not going any further!!

M

That’s why the he is looking to power his HH via a car battery isn’t it…

That's my understanding...

FWIW - I'm looking at doing something similar but will probably go down the route of a UPS. I can then run my NAS & Orbi off it too and get it to automatically shutdown the NAS when the power goes off.

M

[Harpoon]

How many amps / milliamps does the HH need?

Some USB powerbanks will deliver 9v to 12v (max 1.5A) eg

https://uk.rs-online.com/web/p/power-banks/2498448

Then you just need a USB to DC cable. Everything fits in a drawer when not needed.

[geeks]

I know you said no UPS but something like this would run a router for around an hour, how long are you expecting a power outage to be?

https://www.broadbandbuyer.com/products/41962-cybe...

[S6PNJ]

I have one of these that is hooked up to my fibre modem, 1st WiFi repeater, 8 port hub and my NAS - keeps my VOIP line active for about 30 - 40 mins in a power outage. https://www.ebay.co.uk/itm/403928643929 You can get new / replacement batteries from Tanya for about £10 + P&P.