UPS battery - replace 12V 7.0AH with 12V 9.0AH

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AKLWestie

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#215022 8-Jun-2017 20:06

I have two APC UPSs. One uses a 12V 9.0AH battery which I just replaced with a new one. I also have another, older APC UPS sitting around, I noticed it is using a 12V 7.0AH battery. Both batteries are the same physical size and the terminals are the same width.

Question is, can I get a new 12V 9.0AH battery and put it in my old UPS which uses 12V 7.0AH?

Thanks!

Ge0rge

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#1796900 8-Jun-2017 20:11

Yes.

Technofreak

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#1796924 8-Jun-2017 20:52

Yes.

To expand further let's use the petrol in your car as an analogy. Let's say the volts of the battery is like octane rating is to petrol and then AH or amp hours of the battery is like the size of the petrol tank.

If you were to use a different voltage your device will not perform properly and may fail just like may happen if you used the wrong octane rating in your car. If you put differing amounts of petrol in your petrol tank, your car will travel differing distances but still perform properly. Like wise a bigger capacity battery (more amp hours or AH) will give a longer running time for your device without having any affect on the way it operates.

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#1797194 9-Jun-2017 11:19

AKLWestie:

Question is, can I get a new 12V 9.0AH battery and put it in my old UPS which uses 12V 7.0AH?

Thanks!

You can put any ol 12v batt in there, how long will it last is the real question
- get a batt thats designed/specced for use in UPS's
- "AH" may be just a fudged/made up number on the new batts , so 7 or 9AH may not make any real differnece

Also, there is a very real chance ...the.. new.. batts.. may.. fail within 6months
Ive seen good brand replacement batts fried within 5 days

There is no easy way to know the state of the UPS's circuitry , it may slowly fry the new batts .
It happens , thats the chance you take

openmedia

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#1797212 9-Jun-2017 11:40

I've got a Dynamix UPS 1000D that is on its 3rd set of batteries. Takes a pair of 12V 7.2 AH units. Last time I uses 7.6AH as they were the same price and had no issues.

Generally known online as OpenMedia, now working for Red Hat APAC as a Technology Evangelist and Portfolio Architect. Still playing with MythTV and digital media on the side.