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Old 05-31-2012, 04:25 PM   #1
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Default Battery Back-up Hack Question

My boss gave me his old APC UPS 1500, only problem is it needs new batterys, my question is can i use any 12v deep cycle battery because i have on that i use to use like a cap in my truck for my subs and now i have no use for it.

Any help would be great
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Old 05-31-2012, 04:27 PM   #2
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Default Re: Battery Back-up Hack Question

Does the UPS use 12v or 6v batteries?

You have to make sure that the battery is also compatible with the charging circuits in the UPS, otherwise very nasty, explodey things might happen.
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Old 05-31-2012, 04:30 PM   #3
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Default Re: Battery Back-up Hack Question

they are 12v
and how do i check the compatible?
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Old 05-31-2012, 04:43 PM   #4
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Default Re: Battery Back-up Hack Question

Good question. Unfortunately, I am not a battery engineer.

However, if the batteries used in the UPS are deep-cycle gel-types, then they will have a different charge-profile than your average car battery.
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Old 05-31-2012, 10:17 PM   #5
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Default Re: Battery Back-up Hack Question

well this a gel cell batt. for car audio stuff
this is the battery Audio Savings | Kinetik KHC600 Power Cell Car Audio Battery System, High Current, 600w HC600
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Old 06-03-2012, 05:56 PM   #6
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Default Re: Battery Back-up Hack Question

APC uses SLA (Sealed Lead Acid) batteries from various manufacturers. If you still have the old batteries (a UPS this size will have multiple batteries in series, parallel, or a combination of the two), you can peal off the APC sticker from the batteries. This will reveal the actual manufacturers markings. You want to know the voltage (probably 12V) and the amp hours (ah) of the original batteries.

You can then rebuild the battery pack with new batteries of the same specs. A higher amp hour battery should work with no problems so long as it's physically the same size and is the same voltage.

Exactly what model is this? A Smart-UPS, Back-UPS, or ??? A Google of the actual part number (look for a sticker with part number and serial number) should tell you what the "RBC" number for the APC replacement is. Then google the RBC number and you'll find the generic replacement batteries that are acceptable alternatives.

Most likely, the batteries have a wiring harness that will need to be transferred to the new battery (not necessary when using the actual RBC replacement, but needed if replacing with generic batteries).

APC recommends replacing UPS batteries after 3 years, but my experience with them says they are usually good for around 5 - 6 years. I have replaced about 75 SLA batteries in APC UPS units over the last three years. As they fail, they tend to swell, particularly on the ends. Eventually the ends crack open and the acid leaks out. Not good when that happens. Generally, a new battery = UPS good as new, but about 1/10th of the units I deal with are not reliable, even with a new battery, after about five years. We had one start melting (literally)...it stunk up the whole lobby. The wiring had shorted out on it...battery was the least of its problems. Others fail because it improperly reads incoming voltage, triggering it to switch to battery do to a non-existent brownout.

Good luck!
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Old 06-04-2012, 01:51 PM   #7
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Default Re: Battery Back-up Hack Question

Best best to go the APC website. Country Selection Page
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