Interesting. AliExpress sells a BYOB version if anyone is interested.
Item 1005009384723219
Did you confirm it handles the issues noted by @pauljneil2 above?
Ouch, those are high priced dodads. I liked my out of pocket cost better. ~$10.00 for three units, now that I also know the voltage can be changed by removing a resistor from one option to another. I can show where in a pic if you need one.
@Ranchitat , I tried that number at AliExpress and it shows no results.
@danabw
Granted, I am always testing but so far, I can not find fault with this unit. I am using 6 of them with 2 3000mah cells each, so 6ah @ 9vdc , 5v, or 12v and runs quite a long time. Currently, one is powering my modified flair vent, another 3 on my mesh routers, one on my Hubitat hub and one on my unmanaged switch for my hard wired devices.
Yep, I paid $10.00 for 3 devices do $20.00 bucks for the 6 units I am using currently. I have already ordered another 6 units for upcoming projects.
Seriously everyone, I do not normally suggest products. This one impressed me on so many levels. Dependable, stable power for days in a no power situation. All of our Internet, routers, and hubs are now protected. Even though they have a usb-c connector, for charging, I am only using a 5v 1 amp power block. I may end up needing a 5v 2 amp charger but so far, it is going well. I will advise if I find anything else out about them in the future.
Thanks for the help everyone.
I forgot one thing.
I use one unit to power one device. This is for another reason, besides keeping most of my equipment up if one piece fails. It also allows me to put in different cells for different capacities. I plan on testing and making larger banks to run different items.
Hmm, stoopid redirects. 
Well, here's a link, let's see what the system does to it:
https://www.aliexpress.com/item/1005009384723219.html
Edit: WTH are these doodads that you're referring to? 
Dodads =
https://www.amazon.com/Uninterruptible-10400mah-Switch-Backup-Supply/dp/B0F7G7ZLWJ
And
The one at AliExpress is priced better. Shoot, if it has a 10ah battery like it says, I imagine it is 4.2vdc @ 18 watts.
This model is supplying 5v @ 3amps so yea, they only put out 15 watts.
I would love to test one like you posted to verify battery capacity and output powers. Even with 18w, I do not think I would use it on more than one device at a time.
Sorry, that wasn't clear.
I was asking about the devices you are currently using.
I sorta think it's the ones from the op but not really sure. 
I'm also totally lost now...my fault, not anyone elses, but I am kerfuddled.
100% confirmed, I unplug from mains and move around the house with the hub like it's nothing.
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Yes, here
https://www.amazon.com/gp/aw/d/B0D4TVRJ54?psc=1&ref=ppx_pop_mob_b_asin_title
And I am still testing rigorously and I will update at a later time. So far, without adding extra battery holders, it can hold 2 cells as is.
@SebyM
Thanks for repeating my tests. Peer review is always the best.
@danabw
Sorry, my bad. After I posted these, someone else has the other two above but like I said, they are expensive compared to mine. Well, it is mine now. Lol.
With My oldest ones, they had to be purchased at a set voltage. (5,9,12)Vdc
The newer ones, they can be configured.
Paul
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I just went back and checked and the one the OP was showing only holds one cell so at best, 3500mah? This one uses two cells. There seems to be a lot more components on this one than the 1 cell unit. Also, I do not know the possible runtime tests (per device), but I'm running them now. The Motorola mesh routers I am using actually needs a lot of power to boot it up and I have 5 of them scattered around my property.
I have one of the @danabw ones. I just checked it a week ago. After 4 1/2 hours on the UPS I gave up and plugged back in.
During my testing, I put a special meter that not only measures the load, it also keeps time so you know how long it ran before it died. Those are the results I will post as they come up.
If you create a new account
Search form “Type-C 15W 3A Fast Charge UPS“
[Ask me how I know it works.]
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Yep, that is the one. Just make sure that when looking at the component side, with the usb-c on the left side, on the upper right side, you will see a place for 12v, 9v, or 5v for the led. Only one place will have the led but the other two are there so if you change the r7-r9 values for requested voltage out, you can move the led for the proper voltage after replacing r7 & r9.
I hope that clears up any questions.
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Since I only have about a dozen or so projects in various states of non-completion, I thought I'd take on yet another. I picked up a pair of these boards and a couple of 18650 batteries from Amazon the other day. The batteries charged fine, but I have yet to solder a micro-usb cord to the board's output (it wouldn't be an unfinished project otherwise).
I'll take one of these up north in the spring to put on the C7 at our summer house, as there's no UPS up there. Here, I have three hubs but they're all powered by the UPS on my network rack, and things are set up so they cleanly shutdown before the UPS runs out of juice.
I'm curious why you use these instead of a conventional UPS, or are you using them in addition to one? This little board is cool, but it won't prevent an uncontrolled hub shutdown in the event of a lengthy power outage. My UPS will only keep things running for about 20 minutes, but I'm not sure I care about keeping my hubs powered up during a lengthy power outage as virtually nothing would be controllable without power anyhow.
Or am I missing some other benefit? There was mention somewhere in this thread about monitoring the battery level so you don't keep it charged at 100%, but how do you do that? No docs came with the board, and I don't see any other outputs so how do you know the battery level at all?
Traditional UPS devices convert back and forth to AC and there is a huge loss because of that. I have the UPS that @dJOS made which is a awesome piece of tech. It is slick and with just two LiFEPo4 batteries i get over 12 hours of backup. Do i really need that much no, but It makes it allot easier.
I think this is about the voltage you charge the battery to. In generally from a perspective of keeping the battery healthy for as long as possible it is generally not optimal to charge a battery to it's max voltage. I believe with @dJOS setup his ups he set it to charge to a voltage slightly below the max charge value to improve battery life.
If you are taking this on you may want to reach out to @dJOS and see where he left off. I think at one point there was talk about that solution being enhanced with a micro controller so it could talk to the hub directly.
This is the UPS that resulted from that USB-C battery backup i mention above
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What happened to that project. Did it loose momentum. What could be interesting is if the design was working and could be shared so folks could order it built from PCB Way and such. I really like the UPS battery device i got and it has been working well.
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Right, I understand how a UPS works, and I understand about charging Li-ion batteries. I'm using the one that @pauljneil2 posted:
Two for $12 and simply require soldering the proper usb cable to the output terminals (and batteries).
Maybe the comments about monitoring battery voltage are referring to the @dJOS project, not this board. Not a big deal, I'm not going to fuss over battery life of a battery that costs a few dollars.
Makes what easier? Without power, I can't see that my hub is going to do much good chugging away on its own, or perhaps I'm missing something. What happens to your hubs after 12 hours, do they just die? At least with a UPS and monitoring software, I can do a clean shutdown of the hubs. I'll only get 20 minutes with my current UPS, but without power nothing's working anyhow.
Just trying to understand the advantage of these little boards vs a traditional UPS. I've already committed $12 after all, so I need to know
I had to abandon the upgraded version with integrated Zigbee due to needing multiple rounds of eye surgery. My eyes still aren’t quite right, so my projects list is looking very dusty. 
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I power mine with poe because it's 50 feet from my rack. My poe switch is on ups. My ups is on whole house backup power.
If I was not running my hub on poe I might want one of these because 1) I don't want power interrupted on the hub 2) I don't want a line voltage huge ups where I have my hub hidden.
Typically our power outages are less than an hour. Not every circuit in the house is on backup. Even so I don't want the hub dropping when there is a switch over.
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