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

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List Price: $23.99
Sale Price: $12.03
Today's Bonus: 50% Off

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.

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I had problems with this APC replacement battery from the day I got it. The positive and negative poles are thinner than on original APC batteries, so the wires do not fit tightly and kept coming off. After having to reconnect them several times, I finally had to tapes the wires down with duct tape. Then after about 3 weeks of use the battery died. The APC unit alarmed and the "replace battery" red led came on. Amazon has a no return policy for batteries, so I just went and purchased a new APC es550 at another store. Just to test this replacement battery, I put it in the new APC 550, and again the "replace battery" led came on. So the battery I got is obviously defective. I wrote to ecom electronics and asked for a working battery since I can't return this one. I will post again when I get their response.

UPDATE: I just received a replacement battery from ecom electronics. They responded to my post right away and I had the replacement battery within a week. For those reasons I am changing my rating from one star to 3 stars. I will install their new battery and see if it lasts longer than 3 weeks. I will post here again once I determine if the replacement battery keeps working for a reasonable amount of time.

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

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.

Honest reviews on 12V 8.5AH Sealed Lead Acid (SLA) Battery for APC ES500 ES550 LS500

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.

Find helpful customer reviews and review ratings for 12V 8.5AH Sealed Lead Acid (SLA) Battery for APC ES500 ES550 LS500

This battery is a well-built, cost-effective replacement for a spent OE battery in higher-capacity APC (and likely other) UPS units. I'm pleased with the quality of the battery and it is working well after a month of use.

The only caveat is that APC lists quite different batteries with similar names and numbers, making it somewhat difficult to ensure you order the correct unit for your UPS. Moreover, the online APC battery charts are sometimes wrong or misleading. Take the time to open your UPS, remove the battery, note the numbers, and measure the battery dimensions before you place an order. This could save you a lot of hassle.