I have an UPS with two 12v 7ah lead batteries. If I want to change the batteries I would typically go with lead batteries but here’s my question, can I use some portable mobile power banks to use it?

Because I have a 20000mah “INUI” lithium power bank that is rated for 12v at 1.5A, is it a good practice to buy several of these (since they are about 20 bucks) disassemble them and use them as ups batteries?

EDIT : clarifications

      • MangoPenguinEnglish
        3·
        1 month ago

        3s would be 11.1v and 4s is 14.8v, so I’m not sure where you got 12v from.

        • foremanguy@lemmy.mlOPEnglish
          1·
          1 month ago

          It is written on the back of the powerbank (sorry but I’m not so good in electrics)

          • MangoPenguinEnglish
            2·
            1 month ago

            Ah gotcha, that’s the regulated 12V output with USB PD mode, and not the voltage of the battery inside.

            • foremanguy@lemmy.mlOPEnglish
              1·
              30 days ago

              Ohhh okay, sad… Is there a way to get these 12v to use it instead of the stock lead batteries?

              • MangoPenguinEnglish
                2·
                30 days ago

                Not easily or cheaply, because of the voltage mismatch. Using a buck / boost converter setup tuned specifically for the UPS might work but would be pricey and probably not that reliable.

          • roofuskit@lemmy.worldEnglish
            2·
            30 days ago

            If you’re this confused you shouldn’t be trying to change battery types in a device that can power appliances.