UPS battery replacement

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dark666

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Hi to all

I'm repairing several UPS Systems.
I came across one UPS that someone replaced its battery of 12V 9Ah by a 15V 5Ah battery that resulted in damaging the 12V relays as the relays were the only parts that was burnned.
Replaced the relays and tested the UPS with an 12V 7Ah battery the UPS works perfectly.
The problem is that I can't find 12V 9Ah batterys in any store.
I used a 12V 7Ah battery to test but i don't know if that will be OK for long term solution.
Will the UPS work with a 12V 7Ah battery?

Thanks
 
Assuming the battery is the same in all other respects, it will have 22% shorter holdup time.
 
If placement of battery is not an issue, you could install higher Ah battery + external charger to boost backup time. I have been using 600VA UPS with 45 Ah battery (replacing 7 Ah one) for last 3 years without any problems.
 
It would be nice to higher ah battery the problem is that it would not be safe to have an external battery due to kids and pets... If using 7ah battery is ok, i'l stay with that.

Thanks to all
 
I don't see how that is possible as myself replace these ridiculous batteries with automotive 12V for years without problems.
 
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