Rated 4.82 out of 5 based on 156 customer ratings
(156 customer reviews)

$21.99$179.99

ML8-12 – 12V 8AH Replacement for APC Back-UPS ES 500 Battery

SKU: ML8-121119 Category:
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$ 21.99
$ 39.99
$ 74.99
$ 109.99
$ 149.99
$ 179.99
Delivering power when you need it, the Mighty Max ML8-12 12 Volt 8 AH uses a state of the art, heavy-duty, calcium-alloy grid that provides exceptional performance and service life in both float and cyclic applications.
The ML8-12 is an Absorbent Glass Mat (AGM) technology with a valve regulated design, that can be used in enclosed and indoor environments without leaking or maintenance, providing a superior performance for thousands of models.
Mighty Max SLA batteries are utilized in a wide variety of applications including; Consumer Electronics, Electric Vehicles, Engine Starters, Golf Carts, Hunting, Lawn and Garden Tools, Medical Mobility, Motorcycles, Power sports, Portable Tools, Solar, Toys and Hobby, Access Control Devices, Emergency Lighting, Security and more.
Specifications:
Voltage: 12 Volt
Amperage: 8 AH
Chemistry: SLA, AGM
Terminal: F1
Battery Dimensions:
5.94 in x 2.56 in x 4.02 in
Weight: 4.96 Lbs
Warranty
1 Year
Multi Packs Bundled Savings

1 Pack, 2 Pack, 4 Pack, 6 Pack, 8 Pack, 10 Pack

156 reviews for ML8-12 – 12V 8AH Replacement for APC Back-UPS ES 500 Battery

  1. Rated 5 out of 5

    biker boy

    Second replacement battery for my APC. I use the battery backup plugs for the VCR and DVD recorder, the surge protection plugs for the plasma flat screen, amplifier, and Blu Ray player. Worked great so far. I think the battery lasts about 3 years.

  2. Rated 5 out of 5

    Alaska Miner

    aaaaaaaa++++++++++

  3. Rated 5 out of 5

    Don S.

    It’s a replacement battery and it replaces well

  4. Rated 5 out of 5

    John S. Whitney, Jr.

    Easy to install — no issues, quick ship. Glad to have protection again.

  5. Rated 4 out of 5

    Kern

    This is a good replacement battery for my APC unit. The only thing to not is that the tabs for the connectors narrow down at the ends. This makes the connectors from the unit not fit as tightly as the original battery where the tabs are the same width from the battery to the tip. Otherwise, a good replacement for the money.

  6. Rated 5 out of 5

    Gary RV_Wizard

    I bought this to replace the battery in my APC emergency power supply unit. It’s the second time I’ve done that – the batteries seems to lose capacity after about 4 years. The battery is a perfect fit and performs well.

  7. Rated 5 out of 5

    Gene

    This battery fit in the enclosure without issues, was a good price and I hope it will last a few years.

  8. Rated 5 out of 5

    Rafael C

    So far so good

  9. Rated 5 out of 5

    TrinityMan

    On time delivery, battery installed with ease.

  10. Rated 5 out of 5

    Alan

    ANOTHER “A+ Here on Price , Quality & Seller!

  11. Rated 5 out of 5

    Oh, boy

    Easy to install, the unit works again, we’ll see how long the battery lasts.

  12. Rated 5 out of 5

    SherryLee

    Battery is working great! Very timely shipping! Thank you!

  13. Rated 5 out of 5

    Rinse Some

    Price is right. Battery was well packed and delivered as expected.

  14. Rated 5 out of 5

    sba

    Battery was as advertised, was easy to install, and after about one month is working fine.

  15. Rated 5 out of 5

    Richard Comstock

    Got it quickly and installed. Works.

  16. Rated 5 out of 5

    inthe303

    I used this as a replacement in an APC that failed. It has been working great for quite some time.

  17. Rated 4 out of 5

    Chris

    I have an old APC Back-UPS device with a failing battery. The Mighty Max replacement battery was easy to install, fit perfectly and is now helping me keep my gaming computer up & running!

  18. Rated 3 out of 5

    Eligio Betancourt

    This was my third battery which carries a 12month warranty with a life cycle of only 9 months.I failed to keep a copy of the receipt in the past.

  19. Rated 5 out of 5

    lladnar

    Good value, easy to install and fits perfectly.

  20. Rated 5 out of 5

    M.R.McElwain

    Quick delivery. Low price. Perfect fit.Will update review after more use.

  21. Rated 5 out of 5

    Allan Lowe

    Ordered six batteries. All were new, and easy to install.

  22. Rated 5 out of 5

    Nick T. Pierce

    Received AND INSTALLEDIS NOW IN DAILY USE.

  23. Rated 4 out of 5

    Jan

    Working well. Can not rate battery life as it has just been installed.

  24. Rated 4 out of 5

    Janine Donovan

    Working well. Can not rate battery life as it has just been installed.

  25. Rated 5 out of 5

    Bethesda Dad

    Right size, fully charged, terminals a bit smaller than previous 3-yr battery, but with a little squeezing it fit just right. Can’t say anything about how long it will last.

  26. Rated 5 out of 5

    Phillip K. Johnson

    Hopefully this lasts half as long as the APC battery that it replaced.It shipped quickly, arrived perfectly packaged and intact, and charged as expected in an APC BackUPS 550 ES.

  27. Rated 4 out of 5

    Gabe

    I’m using this battery in an APC brand battery backup (BE500U) and I had a system failure after 13 months. At first I thought it was the battery but now it seems that it could be the APC unit. Unfortunately, I can’t delete my review and must pick an overall rating.

  28. Rated 5 out of 5

    Michael Mitchell

    Using battery for apc backup with great results no problems and would buy again love it.

  29. Rated 5 out of 5

    golfingMAD

    New battery came very quickly and was a pretty easy swap out in my APC. As others have said, I found the contact blades a little narrower that those on my existing battery. Had to delicately pinch the connecting terminals to grab better or otherwise fit too loosely and could fall off. My APC was back in full swing in minutes and we’ve had a couple power outage that confirmed battery held it’s charge and gave us ample time to do whatever we needed to get done. I’d buy again (now that I have the terminals crimped).

  30. Rated 3 out of 5

    VM

    Battery backup for WiFi router. Very little short battery life

  31. Rated 5 out of 5

    Benny Wechter

    Easy to replace, price is good.

  32. Rated 5 out of 5

    Benny Wechter

    Easy to replace, price is good.

  33. Rated 5 out of 5

    JJT2004

    Better than OEM equipment.

  34. Rated 4 out of 5

    Roslyn Birnbaum

    It’s doing what it’s supposed to do so far. Only got it about a couple of weeks ago. My last battery lasted about 4 years. If this one lasts as long, I’ll buy it again.

  35. Rated 4 out of 5

    Roslyn Birnbaum

    It’s doing what it’s supposed to do so far. Only got it about a couple of weeks ago. My last battery lasted about 4 years. If this one lasts as long, I’ll buy it again.

  36. Rated 5 out of 5

    JJT2004

    Better than OEM equipment.

  37. Rated 5 out of 5

    Retief

    This arrived safely packaged and quite quickly. Just open up my APC UPS. Slid out the old battery. Disconnected the terminals. Got the new battery. Attached the terminals and slid it back in. Plugged the UPS back in and it was working again. Left it to charge for a couple of days. No complaints from it. Then plugged in some devices and it has been working ever since. Kept powering my NAS when the UPS was unplugged. Good to go for another couple of years (hopefully!) The battery was a perfect fit. Can’t comment on longevity as it is now being put to the test.

  38. Rated 5 out of 5

    Mark H Roberts

    Good replacement in my uverse

  39. Rated 5 out of 5

    Ken D

    After many years, the battery in my ups died. This was a perfect replacement. The specs matched, it fit and so far seems to be working fine. Only had it a few months.

  40. Rated 5 out of 5

    Ken D

    After many years, the battery in my ups died. This was a perfect replacement. The specs matched, it fit and so far seems to be working fine. Only had it a few months.

  41. Rated 5 out of 5

    Chucko

    I have several old UPS’s throughout the house i use for my electronic gadgets. This battery was the inexpensive way to keep them running.

  42. Rated 5 out of 5

    Paul E. Muck

    Good buy. Great price for the item, I Sam happy

  43. Rated 5 out of 5

    Paul E. Muck

    Good buy. Great price for the item, I Sam happy

  44. Rated 5 out of 5

    Web Customer

    ok

  45. Rated 5 out of 5

    Customer

    ok

  46. Rated 5 out of 5

    Florida Guy

    Works fine, fits fine

  47. Rated 5 out of 5

    Jauuneken Preciado

    Great battery very cost efficient.

  48. Rated 5 out of 5

    Jauuneken P.

    Great battery very cost efficient.

  49. Rated 5 out of 5

    Fred Levitt

    Fast delivery and easy to install. Good instructions with the battery.

  50. Rated 5 out of 5

    Farmanthor

    APC UPS products last for a long time but the batteries fail after normal wear and tear. A replacement battery is less than half the price and very easy to install. I recycle the battery and reuse the same casing. Good for the environment and good for the purse.

  51. Rated 5 out of 5

    jerryez

    wORKS GREAT, SO FAR.

  52. Rated 5 out of 5

    Forestbrat

    Just what we ordered, arrived as stated and yes, I would buy from this seller again!

  53. Rated 5 out of 5

    Forestbrat

    Just what we ordered, arrived as stated and yes, I would buy from this seller again!

  54. Rated 5 out of 5

    W. Sanders

    it is always a struggle for me to get a battery into these backups, new or replacement, but this battery is the right size and works well.

  55. Rated 5 out of 5

    fixitall45

    So far battery works great, holds a charge very well.

  56. Rated 5 out of 5

    Mikey

    I’ve used this brand for many years and to put it simply they always perform flawlessly. Good product at a great price.

  57. Rated 5 out of 5

    David E Mevis

    Using the battery for a portable solar generator to recharge USB devices and amateur handitalkies. Small footprint mounted in the utility box I’m using and allowed a 10A charge controller, a multi-in/out device, AND a 10W 12V solar panel to all be mounted and stowed inside the utility box. The whole package is no bigger than a small 6-pack cooler and all I have to do is remove the solar panel and plug it into the box to begin charging. The multi in/out also has a voltmeter I connected with a momentary on push-button, and twin USB outlets connected to the Load output of the charge controller allowing the USB outlets to be turned off. The battery is perfectly sized for this application!

  58. Rated 5 out of 5

    David E Mevis

    Using the battery for a portable solar generator to recharge USB devices and amateur handitalkies. Small footprint mounted in the utility box I’m using and allowed a 10A charge controller, a multi-in/out device, AND a 10W 12V solar panel to all be mounted and stowed inside the utility box. The whole package is no bigger than a small 6-pack cooler and all I have to do is remove the solar panel and plug it into the box to begin charging. The multi in/out also has a voltmeter I connected with a momentary on push-button, and twin USB outlets connected to the Load output of the charge controller allowing the USB outlets to be turned off. The battery is perfectly sized for this application!

  59. Rated 5 out of 5

    Web Customer

    Product came as promised. Easy install. No issues

  60. Rated 5 out of 5

    Customer

    Product came as promised. Easy install. No issues

  61. Rated 5 out of 5

    Mike

    Was the solution I was looking for. Much lest expensive than the OEM version.

  62. Rated 5 out of 5

    Robert W. Herman

    Excellent.

  63. Rated 5 out of 5

    Michael Orlando

    So far so good

  64. Rated 5 out of 5

    Justin Naylor

    Working as intended. Good product. Would buy again.

  65. Rated 5 out of 5

    Greg

    All I got to say is it works as intended previous one lasted for three and a half years hope this one lasts for as long but for $17 you can’t go wrong.

  66. Rated 5 out of 5

    Alex Nowicki

    works great

  67. Rated 5 out of 5

    Terry R. Nye

    I purchased this battery to replace a dead one in an APC UPS 500 power supply. The battery arrived very quickly from the seller and was a perfect replacemen. It remains to be seen how long it will last. My last one (a different brand) lasted about 2. Years, so that may be about how this one will hold up. If so, it will be worth it, and the price was very competitive.

  68. Rated 4 out of 5

    Harv V

    Bought and put this in service for my APC ES500 UPS two years ago. It just died. I’ve had about a dozen short power outages during that time. If two years is the expected lifespan, then I guess it deserves 3* or 4*. If a 2-year lifespan is shorter than what it should be, then it deserves a lower rating.

  69. Rated 5 out of 5

    beavis

    This has a great charge out of the box and fixed my UPS on the spot. Thanks!

  70. Rated 4 out of 5

    David H. Parkhill

    Worked!

  71. Rated 5 out of 5

    Abbott Fleur

    This is the 3rd one I purchased (for multiple uses). Delivered quickly and all are working well.

  72. Rated 5 out of 5

    Keith Howard

    I have bought several of these. Never a problem. A lot cheap than buying a new APC.

  73. Rated 5 out of 5

    Tony

    as promised

  74. Rated 5 out of 5

    Terry W. Sanders

    Fit perfectly and provided the power that I needed.

  75. Rated 5 out of 5

    Terry W. Sanders

    Fit perfectly and provided the power that I needed.

  76. Rated 4 out of 5

    DjM

    Bought this to replace a dead battery in a harbor frieght jump box. Have had it for about 8 months. Haven’t had occasion to use it to jump a dead battery yet but has been holding a charge well and was a perfect fit. Would rate it 5 stars if I was able to successfully jump a dead battery will update review if that opportunity presents itself.

  77. Rated 5 out of 5

    Phil Blair

    Fits perfectly, and a year in is working well.

  78. Rated 5 out of 5

    Phil Blair

    Fits perfectly, and a year in is working well.

  79. Rated 5 out of 5

    Tom F. from Maryland

    So far so good it is only a battery for which time will tell,I can tell you it is sometimes a roll of the dice on how long a battery will last,last one only lasted 3 months NOT from this company.

  80. Rated 5 out of 5

    Tom F. from Maryland

    So far so good it is only a battery for which time will tell,I can tell you it is sometimes a roll of the dice on how long a battery will last,last one only lasted 3 months NOT from this company.

  81. Rated 5 out of 5

    IainM

    A bit tough to get into the UPS but that might be a flaw of the unit itself, it’s been a while since I had to install a battery.

  82. Rated 4 out of 5

    Condon Jarvis

    The battery is working fine

  83. Rated 3 out of 5

    R Edrington

    Ordered 2 of these. One was DOA but the other worked fine.

  84. Rated 5 out of 5

    DGS

    purchased to replace backup battery in fios system. installed easily. light and warning beep cleared automatically.

  85. Rated 5 out of 5

    DGS

    purchased to replace backup battery in fios system. installed easily. light and warning beep cleared automatically.

  86. Rated 5 out of 5

    David Storey

    Was easy to install and made much cheaper than buying a whole new UPS unit. I now have all the protection I need.

  87. Rated 5 out of 5

    Web Customer

    It works fine. Stopped the annoying beep!

  88. Rated 5 out of 5

    Customer

    It works fine. Stopped the annoying beep!

  89. Rated 5 out of 5

    HENRY D. CASTRO JR

    recent purchase and it still works, I hope to say the same two years from now.

  90. Rated 3 out of 5

    Peterson Mathew

    It worked on my battery backup machine.

  91. Rated 3 out of 5

    Peterson Mathew

    It worked on my battery backup machine.

  92. Rated 5 out of 5

    Rich Whiting

    This was the right choice for replacing the battery in my APC BackUPS Pro 500. Easy to swap in and working perfectly for nearly a month. Great price, too. If anything changes, will update. But at present five stars for sure.

  93. Rated 5 out of 5

    JasonC

    Great replacement battery

  94. Rated 5 out of 5

    Blake I.

    I bought this as a replacement battery for an APC Back-UPS ES 500.The battery is just like the original so replacement was very simple.

  95. Rated 5 out of 5

    Katman01

    This was a direct replacement for the battery in m UPS. Working just fine.

  96. Rated 5 out of 5

    J. Thomas

    Used for replacement of an APC battery in an APC ES500 Battery Backup. It has been installed for a few weeks and it is functioning well as expected. The fit is perfect. I tested it 3 times by unplugging the APC and it kept my water treatment system running. Prior to installing this a power glitch would require resetting some of the water treatment system elements.

  97. Rated 5 out of 5

    Henry M.

    i love product

  98. Rated 5 out of 5

    Walter L. Jabs Deliver order prior to 8:00Pm as our gated community closes the gate at 8:00PM

    Works as advertised.

  99. Rated 5 out of 5

    Walter L. Jabs

    Works as advertised.

  100. Rated 5 out of 5

    Ronald Schmetzer

    Working as expected.

  101. Rated 5 out of 5

    Carl C.

    Prompt delivery. Easy installation, and performs as advertised.

  102. Rated 5 out of 5

    Ben

    Installed with ease. Works as it should. Much cheaper than replacing the whole unit.

  103. Rated 5 out of 5

    Shirley R. Harris

    We like that it is a vertical battery and takes up less space. WE expect a long life – just the one previously owned.

  104. Rated 5 out of 5

    Web Customer

    Works great in my ups!

  105. Rated 5 out of 5

    Customer

    Works great in my ups!

  106. Rated 5 out of 5

    Scott Musser

    Product was as described, delivered promptly and works great!

  107. Rated 4 out of 5

    John Waasdorp

    As expected and good price.One more star if it lasts a long time.

  108. Rated 4 out of 5

    KING3344

    I’ve been using Mighty Max batteries as replacements in my 3 computers for years. I have never had a problem. I would estimate that these batteries have lasted at least 3 years. I would say that the AVERAGE life of those I’ve used has been about 3 and a half years. (Of course, battery life will normally depend greatly on the AH (ampere-hours) of the battery you buy. A dependable product.

  109. Rated 5 out of 5

    X-Diplo

    It fits (older ES500), it works, and it was delivered on time. Easy to install the replacement. I can’t comment on capacity because I don’t have the instrumentation, but I have no reason to doubt that it’s up to spec. What more is there to say?

  110. Rated 5 out of 5

    X-Diplo

    It fits (older ES500), it works, and it was delivered on time. Easy to install the replacement. I can’t comment on capacity because I don’t have the instrumentation, but I have no reason to doubt that it’s up to spec. What more is there to say?

  111. Rated 5 out of 5

    Anthony Estrada

    clean, simple purchase. I have these in four boxes. No problems so far.

  112. Rated 5 out of 5

    Anthony Estrada

    clean, simple purchase. I have these in four boxes. No problems so far.

  113. Rated 5 out of 5

    dewmon

    batteries are great and they move my e bike at top speed

  114. Rated 5 out of 5

    Shannon

    Works great!

  115. Rated 5 out of 5

    Average User

    fit fine, so far works well, no issues. would reccomend

  116. Rated 5 out of 5

    Captain Crunch

    fast delivery, product as described, Fits my battery backup for my computer – works fine – no problems

  117. Rated 5 out of 5

    Pamg

    My order was processed very quickly and received intact. What can you say about a battery? It is just what I ordered and the price was right too!

  118. Rated 5 out of 5

    HB

    Fixed the problem

  119. Rated 5 out of 5

    Jeffery Brissette

    great

  120. Rated 5 out of 5

    RonKa

    Works great … delivered on time …

  121. Rated 5 out of 5

    Ronald Kaufman

    Works great … delivered on time …

  122. Rated 5 out of 5

    R. Hamlin

    Better than described. quick shipping. thanks

  123. Rated 5 out of 5

    SanDB

    easy to install came on time. Thank you its working great

  124. Rated 5 out of 5

    Web Customer

    We have been using these replacement batteries for over a year now. They are excellent and we plan on ordering more to have on hand as our other battery backups require battery replacement.

  125. Rated 5 out of 5

    Customer

    We have been using these replacement batteries for over a year now. They are excellent and we plan on ordering more to have on hand as our other battery backups require battery replacement.

  126. Rated 4 out of 5

    Donna Townsend

    I got what I wanted.

  127. Rated 5 out of 5

    Haynes Alvis

    Just what we needed

  128. Rated 5 out of 5

    JohnnyB

    Got this to replace the battery in my APC Back-UPS 500 ES. Tested it fully charged & it kept my desktop PC alive for 35 mins, until shutdown at 5% charge (YMMV). Highly recommended! At least as good as the original.

  129. Rated 5 out of 5

    G

    Working as expected

  130. Rated 5 out of 5

    Marc M

    As advertised.

  131. Rated 5 out of 5

    Michael Chamberlin

    Came packaged well and works fine. Easy to install.

  132. Rated 5 out of 5

    Marc M

    As advertised.

  133. Rated 5 out of 5

    Jed

    Fit the APC battery compartment and accepted the battery clips just fine. Unit powered-up and passed diagnostics. Time will tell how its battery life stacks up. Unit shipped quickly and the price was excellent.

  134. Rated 4 out of 5

    Wohali

    Shipping box was a little beat up and it didn’t quite have the packing and cushioning expected beings it is a plastic cased acid battery. Inspected… no leaks, terminals intact. Fit was exact, easy installation , cheap replacement battery. Has been working fine, I’ll update function after some time has passed.

  135. Rated 4 out of 5

    Mark M.

    Battery fit like a glove.

  136. Rated 5 out of 5

    ebungalow

    Does what it’s supposed to.

  137. Rated 5 out of 5

    ronnc

    Delivered when promised and works as stated.

  138. Rated 5 out of 5

    Tom T.

    Went in like a charm. performing beautifully.

  139. Rated 5 out of 5

    Tom T.

    Went in like a charm. performing beautifully.

  140. Rated 5 out of 5

    Torsten

    Battery works well so far. Fits into the APC UPS unit without a problem. Tested it with my computer running and plugged into the backup unit and unplugged the UPS from the wall outlet and the computer stayed on.

  141. Rated 5 out of 5

    David Coley

    Appears to be identical to original battery and fitted with no problems returning a failed unit to full working condition.

  142. Rated 5 out of 5

    Torsten

    Battery works well so far. Fits into the APC UPS unit without a problem. Tested it with my computer running and plugged into the backup unit and unplugged the UPS from the wall outlet and the computer stayed on.

  143. Rated 5 out of 5

    David Coley

    Appears to be identical to original battery and fitted with no problems returning a failed unit to full working condition.

  144. Rated 5 out of 5

    Jaime

    The battery fit and works perfectly with my APC backup power strip.

  145. Rated 5 out of 5

    photo fan

    Excellent product at an excellent price. Works great.

  146. Rated 5 out of 5

    hurricaneghs

    Fits, works, and arrived fast.

  147. Rated 5 out of 5

    slyfox

    Works just as original. No problems.

  148. Rated 5 out of 5

    slyfox

    Works just as original.No problems.

  149. Rated 4 out of 5

    Michael D. Frisch

    I bought it as a replacement for in my ES500 and it’s a perfect fit. I don’t know what longevity will be like but I’ll update this review if it’s disappointing.

  150. Rated 5 out of 5

    hummedan

    Received the product 2 days early and it fit perfectly into my APC battery back up. Will order again.

  151. Rated 5 out of 5

    techguru

    Battery came when promised, and fit like a glove, with color-coded connectors. I thought the price was very reasonable too.

  152. Rated 5 out of 5

    P. ross

    Arrived promptly, reasonable price. Thanks!

  153. Rated 5 out of 5

    Bluejay61

    Battery came on time and is working great

  154. Rated 5 out of 5

    Bluejay61

    Battery came on time and is working great

  155. Rated 4 out of 5

    Max

    Purchased as a replacement for a UPS battery that was no longer holding a charge. The Mighty Max battery fit the compartment perfectly. After installing battery, the UPS has been functioning normally.

  156. Rated 5 out of 5

    Biofilm

    As advertised, a great battery, very timely delivery, I would recommend Might Max batteries to anyone.

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