what happened to that device?
https://mikrotik.com/product/mups

i knew it existed, now was planning an outdoor instalation with outdoor UPS and this thing is nowhere to be found.

The discontinued MikroTik product is not the best for do that, and do not have any battery inside...
You read the instruction?
For example, the product do not convert 12V input (from battery) to 24V PoE-out when DC/PoE-in is lost.

it up-converts it to 20V, i've read it elsewhere. which is plenty for a lhg+omnitik setup.
is there another similar item from some other vendor? something plug and play with 2 wires for an akku

what happened to that device?
https://mikrotik.com/product/mups

i knew it existed, now was planning an outdoor instalation with outdoor UPS and this thing is nowhere to be found.

Every so often... mikrotik makes a dud. Then the discontinue it.

Sometimes Mikrotik make a Dud and keeps on selling it.

When they actually discontinue it... that's you sign to move on.

yes i get it... just, i find it an interesting device.
is there something similar for cheap? from any vendor. i really don't want to put a UPS inside the house.

What I usually do is I use UPS power supplies from Meanwell, I think model is DRC-100B (24V 100W PSU). I combine that with two 7Ah SLA batteries and some weatherproof enclosure.

Never had any problems. On some locations there is even small heater for the batteries because they are installed on sites where outdoor temps can go really low in the winter.

What I usually do is I use UPS power supplies from Meanwell, I think model is DRC-100B (24V 100W PSU). I combine that with two 7Ah SLA batteries and some weatherproof enclosure.

Pozdrav
how do you power the meanwell charger? with 220V?
what i'm looking for is a (smaller) device, that can take a POE input, have POE output , and the electronics to charge the akku.
i'm returning back to the mUPS device that does exactly that , in a closed enclosure, with just 2 wires for an akku.
btw having 2 akku is a bit of a hassle, the minimum then i should put 2 x 4.5Ah. the whole thing with the electronics , cables, adapters and akku would be big and cost more than a normal UPS (i have plenty of cheap APC and eatons already).

main reason behind all this is - the link equipment is on a roof of an apartment complex, there's no space to hide an UPS. if there's nothing on the market that fits the purpose,i just won't put anything and continue to power the equipment directly from 220V.

DIY option: GPEN11 with built-in DC-DC 12v - 24v + external redundant 12v power supply with battery of the required capacity.

There are similar devices, for "industrial" use (DIN rail), but they are AFAIK 12 or 24 V, not 48V.
If you can use 24V everywhere they could be a viable solution.
Examples:
https://yingjiao.com/products/din-rail- ... odule.html
https://www.meanwell.com/productPdf.aspx?i=1052

Yea, everything it's powered from 230V. It's more expensive than UPS for home or office use but it's reliable, easier to service batteries and while I don't have any faulty units for now (oldest PSU is 5 or 6 years old) its easier and cheaper to replace that PSU.

Also I have small cabinet for other wiring if needed.

thanks, but everything linked is actually more complicated than putting a normal UPS on the 24V brick.
meanwell dc-dc COULD be an option but then it requires fiddling with lan cables , taking out power from incoming lan cable, putting a rj45 coupler, DC jack output, another poe injector... all points of failure where moisture and bugs could enter.
will skip putting an ups on that location.

A normal UPS should be less efficient, as there is the inverter bringing back the 12 of 24 V of the battery to AC at mains level (110 or 220V).

The alternative is using a (24V) DC PoE injector with UPS capabilities (instead of the 24 V PoE PSE), (with included - usually 18650 - batteries) examples:
https://www.aliexpress.us/item/3256806563806829.html <- this needs an external power supply
https://www.aliexpress.us/item/3256806543497636.html <- this has built in AC power supply
https://www.aliexpress.us/item/3256806642597033.html <- this has built in AC power supply
https://www.aliexpress.us/item/3256805216729388.html <- this has built in AC power supply

It has to be checked if those are Mode B (most devices - excluded Mikrotik - use Mode A nowadays, but passive 24V is still usually Mode B)

This one is mode B:
https://www.aliexpress.us/item/3256806642597033.html

This one is mode B (Italian):
https://www.alphaelettronica.com/kupsm010.html

these china all-in-ones do look interesting, at least they're not a DIY thingy. only shady thing is they're using li-ion cells ,, and we know chinese cells can light up more easily than brand cells. had a bunch of chinese powerbanks, they didn't last even a fraction of what a brand powerbank could last.
not a bad idea, just to put a lead acid akku instead of li-ion.

I don't know, I have seen a lot of devices that used to have lead acid batteries transitioning in new models to li-ion or other more "modern" batteries.
IF these thingies use "standard" 18650 or 21700 batteries, one could remove the original ones and replace them with known "good brand" ones.
For emergency lights (I care after a few buildings maintenance, some 60 of these lights, typically using 6V 4.5Ah batteries) I would say that lead acid batteries last anywhere between 1 year and 3 years, so (very rough) average two years or so.
Some (few) new replacements have been installed too recently to have any data about their duration, in other devices the 18650's appear to last longer than lead acid, but use may be different.

not a bad idea, just to put a lead acid akku instead of li-ion.

You can't just replace batteries with different chemistry, each chemistry has different charging profile and (unsuspecting) charger may destroy batteries very soon. Batteries may suffer from undercharge (and usable authonomy is the least of problems), even worse can be overcharge (in worst case batteries can even explode).