DC UPS (Battery Backup) for ONT, Router and Raspberry Pi4b

[naylor2006]

It’s got a lot of stamps on it

 Certification Stamps 

Its surely been through fairly rigorous testing, sure there could be a defect in one but isn’t that the risk will all consumer goods…well I hope for my sake I’ll be okay.

[WSH]

Oh stamps, yeah.  I’m sure a certain aircraft manufacturer in the US puts stamps on its planes too.  Don’t say I didn’t warn you.

You wait until one of these sites the National Grid are using to balance renewables goes up.  That’ll be spectacular.

[naylor2006]

Okay dude.

[naylor2006]

@chrisjp indeed the SH2 seems to have a 5.5mm x 3mm DC type, which is quite weird. This is not the same as the BT Wholehome discs as that is 5.5mm x 2.5mm.

But its not the end of the world, there are plenty of adapters/convertors out there so if you are keen on a product like this you will be able to find the correct adapter, maybe just not as easily as the 2.1mm to 2.5mm etc.

[WSH]

They are very difficult to find.  It's a real weird size for BT to pick.

When I first looked the only source I could find for a plug was a company in the US, (Pheonix I believe).  I think Farnell now do one in this country.  Never have found a socket or an adapter.  If you do find a source, please let us know.

[chrisjp]

"What would bother me is that a UPS is on charge continuously. At least with most items you can keep an eye on them while they’re on charge. You can’t stand and watch a UPS all the time."

That comment was enough to put me off getting one of these units. I realised that whenever I needed to leave the house for any appraciable time period, I'd want to disconnect the power to the unit to avoid the (admittedly remote but nevertheless real) risk that it would catch fire. Not worth the risk in my view.

[naylor2006]

Indeed but that is literally how a UPS works, even the 20 grand one we have at work, whilst on mains the batteries stay at 100%, always. Sure it’s got some better tech in it.

There are so many things we leave powered on in our houses that potentially could cause a fire one day, we could spring a gas leak. Just because the impact of a certain device failing is more severe doesn’t make it anymore likely.

With that said being uncomfortable is a very valid reason not to purchase something and I wish I never posted about it 😂

With tumble dryers, dishwater’s, ovens, microwaves, boilers, iPads, iPhones etc all under one roof the risk of fire is always there not to mention the 30’s wiring in my house. If one of these devices ended up being the cause of a fire there would surely be a huge recall like many other products we’ve seen, like Samsungs setting alight in folks pockets.

It’ll be trial by fire.

[WSH]

It’s a question of degree and as someone that’s familiar with the properties of this stuff, I might be being over cautious.  Matches are safe but alkali metal batteries are like leaving a box of matches with your kids.  Sealed lead acid batteries have a far better track record.

There’s a saying in chemistry...”There are old chemists and there are bold chemists but there aren’t any old and bold chemists”. 

[naylor2006]

I’m only half way through my life, I think.

[WSH]

Sorry Naylor.  Not having a go at you.  It’s just that I have genuine concerns about this technology.

Incidentally, I’d get your wiring replaced as well, if I were you.  They used rubber-based insulation in the 1930’s.  That only had about a 30 year operating life.