Rated 4.73 out of 5 based on 128 customer ratings
(128 customer reviews)

$21.99

12V 8AH SLA Replacement Battery for GT12080-HG; for FiOS and UPS

Availability: In stock

SKU: ML8-121333429 Category:
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
Weight

4.96 Lbs

Width

2.56

Warranty

1 Year

Height

4.02

Length

5.94

Quantity

1

Terminal

.187" – F1

Volts

12V

Amp Hour

8Ah

Chemistry

SLA / AGM

128 reviews for 12V 8AH SLA Replacement Battery for GT12080-HG; for FiOS and UPS

  1. Rated 4 out of 5

    CCN ???

  2. Rated 5 out of 5

    SS

    Used for the home security system. Value for the money.

  3. Rated 5 out of 5

    Clyde & Janet Keller

    none

  4. Rated 5 out of 5

    Rob Riccardi

    All good, as described

  5. Rated 5 out of 5

    william

    Good price easy to install

  6. Rated 3 out of 5

    AMC

    I don’t understand why this battery, which is a backup and therefore never really gets used, lasted only 10 or 11 months. While the $20 price tag is attractive, because the battery life is so short, I’m not sure it is a good value.

  7. Rated 5 out of 5

    Web Customer

    Great Price!

  8. Rated 5 out of 5

    Don Cheeks

    great fit, great price.

  9. Rated 5 out of 5

    EP

    Perfect replacement fit and easy to install. Great value.

  10. Rated 5 out of 5

    SCanon

    This is my 2nd purchase. Last one lasted around 2 years. Fast delivery. Good price.

  11. Rated 5 out of 5

    Ronald A. Pellecchia II

    Exactly what was needed for the Verizon back up battery. Easy to install. Battery life is unknown since it’s new. That’s why 3 stars

  12. Rated 5 out of 5

    Peter Rye

    This is not the normal battery that you find in the store, but its what you need for your FiOS gateway.Easy to buy and easy to install. Perfect replacement.

  13. Rated 5 out of 5

    Mark Gutknecht

    Our Verizon box has the back up battery for our home phone. Yeah, I’m one of those hold outs who still has a home phone. When the box starts beeping, I know to replace the battery. I can’t say I’ve tested the batteries life when the power goes out as our phones are wireless. I do have a corded phone for an emergency but haven’t had to use it in many many years. So ultimately, this is a big beep stopper I guess! The beeping occurs every three years or so I think. Shipping was quick and installation was very easy. Exact fit.

  14. Rated 3 out of 5

    Caroline Gaynor

    This battery only lasted 7 months. I will not repurchase.

  15. Rated 5 out of 5

    MonitorAvenger

    My only dislike is Verizon. Their FIOS product beeps mercilessly when the battery winds down, and will not work if you take it out. The replacement battery I ordered stopped the beeping! This is a great product at a discount price that solved my issue.

  16. Rated 5 out of 5

    Chris Clark

    The battery fit and was easy to install!

  17. Rated 2 out of 5

    Alexander S.

    I think, 1 year is unsatisfactory.

  18. Rated 5 out of 5

    Robert W. Wynne

    Made my worthless Verizon backup stop beeping.

  19. Rated 5 out of 5

    Robert W. Wynne

    Made my worthless Verizon backup stop beeping.

  20. Rated 5 out of 5

    Web Customer

    Battery seems to be holding up well. The last one didn’t last the expected three years.

  21. Rated 5 out of 5

    Customer

    Battery seems to be holding up well. The last one didn’t last the expected three years.

  22. Rated 2 out of 5

    K.Lawler

    Installed in Feb…..dead on Oct 4th—-others last 2-3 years. Elsewhere we go…..

  23. Rated 5 out of 5

    Chris

  24. Rated 5 out of 5

    Customer

    Got here fast, no problem to put in…check with me next year if it’s still working.

  25. Rated 3 out of 5

    A.G. Salt

    Battery failed after 8 months. Used as backup in Verizon Fios installation. Other batteries, although more expenive are better values.

  26. Rated 4 out of 5

    kenny Carroll

    Didn’t last as long as expected

  27. Rated 5 out of 5

    Maryann P.

    Exact replacement for previous battery

  28. Rated 5 out of 5

    Richard Steinbock

    This was a replacement for a similar battery purchased several years ago. Using as a power source for a sonar on my boat. Works as advertised and maintains it’s charge better than most I’ve tried similar to this one. Highly recommended.

  29. Rated 5 out of 5

    Web Customer

    I first used the Might Max when my upper battery was reporting problems in my Verizon/Frontier FiOS ONT backup box. Swapped it out and no problem (been a year so far), so when the bottom OEM battery failed, I went right back to the Mighty Max and problem is again solved. If you are getting the replace battery idiot light on your battery backup for your FiOS setup, this is the one to get and it is literally a 2 minute install. THere is just a snap on cover and 2 battery connectors. Could not be easier.

  30. Rated 5 out of 5

    Customer

    I first used the Might Max when my upper battery was reporting problems in my Verizon/Frontier FiOS ONT backup box. Swapped it out and no problem (been a year so far), so when the bottom OEM battery failed, I went right back to the Mighty Max and problem is again solved. If you are getting the replace battery idiot light on your battery backup for your FiOS setup, this is the one to get and it is literally a 2 minute install. THere is just a snap on cover and 2 battery connectors. Could not be easier.

  31. Rated 5 out of 5

    Jacki

    Based on the specs I knew this would fit and work well. And i was able to save a few dollars using Prime.

  32. Rated 5 out of 5

    TirraTop Contributor: Archery

    Needed this to refurbish an older car jumper box. This 8ah battery replaced a long dead 7ah battery so was an upgrade. This battery did not have the same terminals as the original but I knew that when I made the purchase. I figured that a small modification could make things fit and it did. Battery seems to be working as it should in the jumper box. Only time will tell how long it will last.

  33. Rated 5 out of 5

    Tirra

    Needed this to refurbish an older car jumper box. This 8ah battery replaced a long dead 7ah battery so was an upgrade. This battery did not have the same terminals as the original but I knew that when I made the purchase. I figured that a small modification could make things fit and it did. Battery seems to be working as it should in the jumper box. Only time will tell how long it will last.

  34. Rated 5 out of 5

    William S. Longino

    NA

  35. Rated 5 out of 5

    Web Customer

    I like it

  36. Rated 5 out of 5

    Customer

    I like it

  37. Rated 5 out of 5

    James R

    I used this battery in the UPS system in my cable service. Works great.

  38. Rated 5 out of 5

    James R

    I used this battery in the UPS system in my cable service. Works great.

  39. Rated 5 out of 5

    Greg

    Great value for the price. Arrived quickly. Won’t know it’s durability until time passes. But so far–great!

  40. Rated 5 out of 5

    Rich Potter

    Worked great for my VIOS box. Vios wanted 49.99 and other suppliers were lower but this is the best price I found. Easy to install and I can not rate the battery life yet. Ask me again in 5 years…lol.

  41. Rated 5 out of 5

    Eugene France

    Everything was fine

  42. Rated 5 out of 5

    bsf

    I bought this battery to replace the Verizon backup battery. It was easy to install.

  43. Rated 1 out of 5

    Dana Miller

    Lasted just over 4 months before I had to replace again

  44. Rated 5 out of 5

    Patrick Mitchell

    Great Product

  45. Rated 5 out of 5

    Jason_JennyS

    Great item, price and fit

  46. Rated 5 out of 5

    SA

    Great affordable replacement for Verizon.

  47. Rated 5 out of 5

    David Mardesich

    Product was exactly what I wanted and installed easily.

  48. Rated 5 out of 5

    John P.

    came quickly fits perfect do not know about battery life yet

  49. Rated 5 out of 5

    Janet D

    Replaced the back up battery for our Verizon Fios WiFi. Same battery was much cheaper than going through Verizon.

  50. Rated 5 out of 5

    KFrasber0413

    Replaced battery given by cable company which went dead

  51. Rated 4 out of 5

    Alan M. Schultz

    Appears to be similar to Verizon battery, but half the cost. Same size as battery to be replaced and easy to install. Won’t know about battery life until it needs to be replaced.

  52. Rated 5 out of 5

    Lou

    Five stars is for replacing a battery received as new, but was too old to be considered a fresh battery.Customer service at the Mighty Max vendor read the date code and determined a replacement was in order.The battery was everything it needed to be. Many thanks for great customer service.

  53. Rated 5 out of 5

    Jeff O’Reilly

    This brought my Backups back to life, without having to buy a new one. Saved me a lot of money and good as new.

  54. Rated 4 out of 5

    pabbo

    It would be good if these products lasted a bit longer.

  55. Rated 5 out of 5

    RJ

    It was a perfect replacement for my Verizon/Frontier ONT unit in the garage.

  56. Rated 5 out of 5

    B Buchanan

    Battery working fine at this point with no problems

  57. Rated 5 out of 5

    B Buchanan

    Battery working fine at this point with no problems

  58. Rated 5 out of 5

    Bridget D.

  59. Rated 5 out of 5

    Phil

    This is a great battery and costs much less than the GoldStar brand.

  60. Rated 5 out of 5

    Bridget D.

    This accomplished its intended mission by ending that irritating beep from my Verizon back-up unit in the basement (which I don’t really need since I don’t have a landline, but there was some uncertainty as to whether it would affect my internet line). Now the question will be how long will this box last before I need another one?

  61. Rated 2 out of 5

    William Tan

    This does not fit the compartment of the old battery in the FiOS box, it is slightly too large. My FiOS battery backup is White with blue buttons.

  62. Rated 5 out of 5

    Alex

    Perfect replacement for fios backup battery.

  63. Rated 5 out of 5

    Alex

    Perfect replacement for fios backup battery.

  64. Rated 5 out of 5

    Walt3r

    Fits, works, stopped the Verizon box from beeping.

  65. Rated 5 out of 5

    Delon

    it fit

  66. Rated 5 out of 5

    Joe C

    Arrived promptly and was the same as the original. Attached the connectors and replaced the old battery in about 60 seconds. No more annoying chirping. 🙂

  67. Rated 5 out of 5

    Delon

    it fit

  68. Rated 5 out of 5

    Junior A. Mejia Ventura

    Good product. Super fast shipping

  69. Rated 4 out of 5

    Allen Clark

    Good price. Does the trick. Solid unit. No issues, though it’s only been a few months since replacing the FiOS OEM battery.

  70. Rated 5 out of 5

    DeanB

    Arrived quickly. Was easy to replace, and has continued to work well…as expected.

  71. Rated 5 out of 5

    DeanB

    Arrived quickly. Was easy to replace, and has continued to work well…as expected.

  72. Rated 5 out of 5

    Web Customer

    Product was on time, as discribed.

  73. Rated 5 out of 5

    Customer

    Product was on time, as discribed.

  74. Rated 5 out of 5

    LS

    Works great, half the price Verizon was charging and prime shipping!!! No brainer!!

  75. Rated 5 out of 5

    Elizabeth Kornbluth

    Had a hard time figuring out why there was an intermediate beeping in the basement, after discovering the sound was a warning of low battery life in the Verizon box, I looked to purchase a replacement from Verizon. After seeing the price they posted for a new battery back up, I had to look around for a more reasonable solution. Mightymax was HALF the cost and has the same specs as the Verizon battery. Why throw away money when you can buy the same thing for less? The battery works perfectly and solved my problem. Never hesitate to save money when the products are the same. Oh and the shipping was much faster than the estimated shipping stated, double win!

  76. Rated 5 out of 5

    RB at GF

    Product delivered on time and met expectations for use.

  77. Rated 5 out of 5

    susan l.

    Arrived in a timely fashion and works. Curious how long it will last though. May have to update my review later if it doesn’t last.

  78. Rated 5 out of 5

    Rick Meserole

    Just what the doctor ordered.

  79. Rated 5 out of 5

    Rick Meserole

    Just what the doctor ordered.

  80. Rated 5 out of 5

    Gerard Sheeron

    Best price I could find for this battery

  81. Rated 4 out of 5

    Robert V

    cable company replacement for battery backup for phone system- battery doesn’t seem to last long but what does. I found when the red light comes on and tbe control panel beeps – take the battery out and shake it I get 6 more months use

  82. Rated 5 out of 5

    Gerard Sheeron

    Best price I could find for this battery

  83. Rated 4 out of 5

    Robert V

    cable company replacement for battery backup for phone system- battery doesn’t seem to last long but what does. I found when the red light comes on and tbe control panel beeps – take the battery out and shake it I get 6 more months use

  84. Rated 5 out of 5

    J. Giacalone

    Product seems to be working fine. The question is how long will it last.

  85. Rated 5 out of 5

    robert h.

    met expectations

  86. Rated 5 out of 5

    Mindy Sue

    fast service with a quality product —- at an inexpensive price ! Thank you !

  87. Rated 5 out of 5

    Alessandro Lazzarotto

    The battery arrived earlier than expected and it works very well!

  88. Rated 5 out of 5

    Alessandro Lazzarotto

    The battery arrived earlier than expected and it works very well!

  89. Rated 5 out of 5

    shopper_in_ny

    perfect replacement!

  90. Rated 5 out of 5

    Nicholas L.

    easy to install and seems to be good value

  91. Rated 5 out of 5

    Linda H

    So far so good. Haven’t had it for long, but a heck of a lot less than what Frontier offered us. The only reason we even bought a new battery was to get the warning beep shut off,so didn’t want to spend $50. Glad it was very easy to check compatibility. Happy with it so far.

  92. Rated 5 out of 5

    Linda Holder

    So far so good. Haven’t had it for long, but a heck of a lot less than what Frontier offered us. The only reason we even bought a new battery was to get the warning beep shut off,so didn’t want to spend $50. Glad it was very easy to check compatibility. Happy with it so far.

  93. Rated 5 out of 5

    Eddie Ziranski

    Excellent price, came fast, perfect fit into my Verizon box, Thanks

  94. Rated 5 out of 5

    LennyG

    Delivered very quickly. Battery working fine. Thank you.

  95. Rated 4 out of 5

    Mickey

    Only had it a short while but works perfectly.

  96. Rated 5 out of 5

    Neil Blanchard

    It works as expected in our FIOS panel.

  97. Rated 5 out of 5

    Trekker

    Much cheaper than buying it from verizon. Seems to work fine.

  98. Rated 5 out of 5

    hrtampa

  99. Rated 5 out of 5

    Customer

    Replacement battery was delivered fast, same size and same terminals as the original. Easy to exchange. Half the price. Let’s see the life span if it’s a match. I marked the battery with the install date.Very satisfied so far.

  100. Rated 5 out of 5

    Marlene Damato

    great product!! Saved lot’s of money buying it on and not from FIOS.

  101. Rated 4 out of 5

    JZ

    Good price for what I needed. It was 1/2 of the price of similar batteries for use in my alarm panel gateway. Took about a week longer than originally specified for shipping.

  102. Rated 5 out of 5

    Dan Odum

    Good price, dependable, OEM product costs twice as much!

  103. Rated 5 out of 5

    Shawn Suter

    It works as a replacement for the FiOS battery. Not sure how long it will last…we’ll see.

  104. Rated 5 out of 5

    harvey samuels

    ease of installation.

  105. Rated 5 out of 5

    Squirrel

    Replaced the battery for my ATT home internet UPS device. So far it seems to be working and stopped that annoying chirping!

  106. Rated 5 out of 5

    Magdi Labib

    just perfect

  107. Rated 5 out of 5

    Squirrel

    Replaced the battery for my ATT home internet UPS device. So far it seems to be working and stopped that annoying chirping!

  108. Rated 5 out of 5

    Magdi Labib

    just perfect

  109. Rated 5 out of 5

    sanford hofmann

    Works as described.

  110. Rated 5 out of 5

    Texas_Mark

    Works perfectly with my house alarm system.

  111. Rated 5 out of 5

    Texas_Mark

    Works perfectly with my house alarm system.

  112. Rated 5 out of 5

    mrfixit

    Perfect fit and good value for alarm panel battery.

  113. Rated 5 out of 5

    Signorina Sirena

    Just what I needed! Seems to work great.

  114. Rated 5 out of 5

    Telecaster

    This battery works exactly like the original one from Verizon. Sure beats their price. They shipped it right away too.

  115. Rated 5 out of 5

    Telecaster

    This battery works exactly like the original one from Verizon. Sure beats their price. They shipped it right away too.

  116. Rated 3 out of 5

    Michael

    This is the third MightyMax battery I’ve purchased to replace my original Fios battery. First one lasted about 18 months – that’s fine. But the most recent one was just over ten months – which is not good for a never used backup. Will give it one more try – but if it last less than one year, will try an alternative.

  117. Rated 3 out of 5

    Michael

    This is the third MightyMax battery I’ve purchased to replace my original Fios battery. First one lasted about 18 months – that’s fine. But the most recent one was just over ten months – which is not good for a never used backup. Will give it one more try – but if it last less than one year, will try an alternative.

  118. Rated 3 out of 5

    Zzyzx Oh

    I used this as a replacement battery for my FIOS telephone and it lasted 19-months, which is longer than the warranty but less than an unused standby battery should last (in my opinion). If it was one=half the cost of the GS brand, it would be acceptable since it lasts one-half as long.

  119. Rated 5 out of 5

    Phillip Isacksen

    Installed and started to charge immediately. Shipped quickly and packed tight. Saved 50% over retail.

  120. Rated 5 out of 5

    Phillip Isacksen

    Installed and started to charge immediately. Shipped quickly and packed tight. Saved 50% over retail.

  121. Rated 5 out of 5

    E. Talerico

    I needed a replacement battery for an old Crate Taxi guitar amp – this battery was a perfect fit. It powers the amp for about 8 hours at moderate volume – four if I crank it! An overall great product.

  122. Rated 5 out of 5

    Julie A Talbot

    Was exactly what I needed…hopefully it lasts 3years!

  123. Rated 5 out of 5

    Earline Anderson

    great

  124. Rated 5 out of 5

    Ted

    Perfect

  125. Rated 5 out of 5

    snow man

    works great

  126. Rated 4 out of 5

    Bill W

    Plug and play. Worked perfectly in my verizon fiber box

  127. Rated 5 out of 5

    Web Customer

    Ordered a replacement battery for my Verizon FIOS box. The battery arrived fast and properly packaged. It was a correct replacement and had no issues installing it.

  128. Rated 5 out of 5

    Customer

    Ordered a replacement battery for my Verizon FIOS box. The battery arrived fast and properly packaged. It was a correct replacement and had no issues installing it.

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Excellent
Mighty Max Battery
Based on 3443 reviews
My fifth purchase of model ML 7-12 for my gate and kids toys. Always good battery T a good price.
Battery ordered on Friday , arrive next day by UPS on Saturday. This product is for a small generator. The price was right and the service/ delivery amazing.
Battery arrived perfectly packaged.
Previous one run for 2 years in my power supply.
Battery work and fit in my viking jump box. Just fine it came very fast in shipping
Box is pretty beat up and inside styrofoam protecting is broken so it must’ve taken a pretty bad fall at one time I hope that didn’t harm the battery itself
Arrived soon then expected
Good value hope it’s as good as they say
Arrive quick, great packeging and works perfect
Easy Purchase, Fast Shipment & Delivery, Available when others do not have in stock. Fully charged right out of the box. 3 Year warranty! Made in USA.
Great! Arrived in 3 days, put it in hooked it up and it works.