submitted 4 months ago* (last edited 4 months ago) by [email protected] to c/[email protected]

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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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[-] [email protected] 13 points 4 months ago

No, your UPS is tailored to the characteristics of the lead-acid charge/discharge cycle. Some LiFePO4 battery assemblies are built with charging electronics that simulate lead-acid for a drop-in replacement, but those are never cheaper than traditional lead-acid batteries.

[-] [email protected] 2 points 4 months ago

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.

[-] [email protected] 1 points 4 months ago

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.

[-] [email protected] 1 points 4 months ago

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

this post was submitted on 01 Feb 2025

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