this post was submitted on 01 Feb 2025
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Switching out UPS batteries (lemmy.ml)
submitted 3 weeks ago* (last edited 3 weeks ago) by foremanguy92_@lemmy.ml to c/askelectronics@discuss.tchncs.de
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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

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[–] SpikesOtherDog@ani.social 2 points 3 weeks ago (1 children)

This is correct.

Additionally, you would not want to substitute a larger or smaller capacity battery as the charging cycle of the UPS is built for a specific capacity.

[–] cmnybo@discuss.tchncs.de 1 points 3 weeks ago (1 children)

A larger battery generally works fine with an older, dumb UPS. You will just have to connect an external charger if the battery gets deeply discharged. Adding a cooling fan to the UPS would be a good idea since it will be running for a longer time though.

[–] SpikesOtherDog@ani.social 1 points 3 weeks ago

I'll admit, it could, but the battery conditioning might still struggle.