12V 8.5AH Sealed Lead Acid (SLA) Battery for APC ES500 ES550 LS500 RBC110 RBC2

My APC Back-UPS 500 is probably 12+ years old, and the original battery no longer holds enough charge to get my power sipping Mac mini and LCD monitor through the tiniest power glitch, so I did my research and found this offered the best deal for the dollar. At 8.5AH, it has 20% more power than the original 7AH battery had when new. $12 vs. $45. No brainer. Delivery was quick, installation was pretty easy, and my ancient UPS is working as a UPS once again.

Like the first reviewer said this battery is rated another 10-15% higher than the 7.xAmp batteries and is the same price... easy decision. This extra capacity should not confuse any decent UPS controller and like expected the ES550 works fine with the extra capacity without issue. Mine came promptly and worked like a charm. Of coarse there is the distinct possibility that some Chinese marketing dude is just lying on the 8.5 AH rating but since it was the same price, I'm really not risking much.

Buy 12V 8.5AH Sealed Lead Acid (SLA) Battery for APC ES500 ES550 LS500 RBC110 RBC2 Now

1. The unit worked until the first power glitch (Back UPS ES550) then I got a replace battery alarm. I have tried the battery in 3 different ES550 units, same failure. I am returning for replacement and will updte this when that occurs.

2. Update-8.16.12contacted the seller (email) who responded very quickly and said to dispose of the defective unit and they sent a replacement priority mail same day. The new battery works fine. I have simulated a power fail and it worked with no glitches and recharged as expected.

3. This company is very responsive in their communications. I think the bad unit was a fluke and plan to order another for a backup unit I have. The extra amphour is a plus.

Read Best Reviews of 12V 8.5AH Sealed Lead Acid (SLA) Battery for APC ES500 ES550 LS500 RBC110 RBC2 Here

Used this to replace the battery in an APC ES 550. Worked perfect and much more economical than either another APC battery or replacing the whole unit.

I originally bought the APC ES 550 thinking about longevity and saving money down the road when the battery went bad. Thanks to this battery that has worked out well. As long as reliable replacement batteries are available, I think the APC ES 550 would have an indefinite life span.

Electrical connections on this battery were fine and not loose. Fit just like the battery it replaced.

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After a few years I needed to replace the battery in my APC ES 550. Working from a home office I mainly wanted the ability to gently power down my PC and any peripherals (external hard drives etc) in the event of an extended power outage. An extended outage this week gave me the chance to try this out. The battery performed better than expected. After about 10 minutes I had the laptop unplugged (running on its battery) and everything except the DSL modem turned off. I had internet access and was working for the entire 2+ hr outage. Home power outage does not equal a DSL or broadband service outage, so this was pretty nice. If your UPS is a few years old don't replace it just get a new battery. This one recommeneded.

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