Rated 4.91 out of 5 based on 170 customer ratings
(170 customer reviews)

$17.99$139.99

ML5-12 – 12V 5AH Alarm System Battery Back Up Vista 20P ADT

SKU: ML5-12264 Category:
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$ 17.99
$ 28.99
$ 39.99
$ 52.99
$ 74.99
$ 109.99
$ 139.99
Delivering power when you need it, the Mighty Max ML5-12 12 Volt 5 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 ML5-12 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: 5 AH
Chemistry: SLA, AGM
Terminal: F1
Battery Dimensions: 
3.58 in x 2.76 in x 4.21 in
Weight: 3.09 Lbs
Warranty 1 Year
Multi Packs Bundled Savings

12 Pack, 1 Pack, 2 Pack, 3 Pack, 4 Pack, 6 Pack, 9 Pack

Volts

12V

Amp Hour

5Ah

Chemistry

SLA / AGM

Quantity

1

Length

3.58

Width

2.76

Height

4.21

Weight

3.09 Lbs

Warranty

1 Year

170 reviews for ML5-12 – 12V 5AH Alarm System Battery Back Up Vista 20P ADT

  1. Rated 5 out of 5

    Barbara

    Both value and speed of delivery.

  2. Rated 5 out of 5

    R. Nero

    The battery was easy to install and everything works well. The price was great.

  3. Rated 4 out of 5

    Sohappy

    Fast shipping, works well.

  4. Rated 5 out of 5

    Tom Buford

    Easy to install in my UPS and works great so far.

  5. Rated 5 out of 5

    R U IRIE

    Excellent replacement for the one in the security system –

  6. Rated 4 out of 5

    Anthony Sloterdijk

    Perfect size

  7. Rated 5 out of 5

    adam wiseman

    easy to install. works as expected. backup for security system and does its job

  8. Rated 5 out of 5

    CELS 1

    The battery is used in a home security system. The only problem I had was the length of time from order to delivery.

  9. Rated 5 out of 5

    CELS 1

    The battery is used in a home security system. The only problem I had was the length of time from order to delivery.

  10. Rated 5 out of 5

    D. A. Pelley

    Battery is a perfect replacement — fit, connectors, size. Glad to find this. Hope it lasts even close to its predecessor, which was close to 20 years!

  11. Rated 5 out of 5

    r2

    Easy to install while just removing the wires from the old one and transferring them to this one. Exact dimensions of the prior one and time will tell on how well it performs.

  12. Rated 5 out of 5

    Roger

    Great replacement battery

  13. Rated 5 out of 5

    Julie

    This battery was cheaper than the others but it is wonderful! It is easy to install and has worked perfectly from day one!

  14. Rated 5 out of 5

    PRR

    My home security system uses this type of battery and I was easily able to replace the one which I had in place. These batteries tend to last a good 5 years or so in the current usage.

  15. Rated 5 out of 5

    Btrandell

    This company does everything to make sure the customer has everything you need!

  16. Rated 5 out of 5

    Weasel

    Installed this as the power for a small solar garden display. Has been in protective box, but has been out in the weather for 2 years so far…still going strong

  17. Rated 5 out of 5

    R Otts

    Used for alarm system backup.

  18. Rated 4 out of 5

    Timothy E West

    It is a high quality replacement battery. Appreciate the fast shipping

  19. Rated 5 out of 5

    Laurette V.

    Purchased this battery for my house alarm system, great price and fast shipping.

  20. Rated 5 out of 5

    Laurette V.

    Purchased this battery for my house alarm system, great price and fast shipping.

  21. Rated 4 out of 5

    Tony S

    It was bought as a spare.

  22. Rated 5 out of 5

    JULIO PICHS

    Convenient or my system

  23. Rated 5 out of 5

    JULIO PICHS

    Convenient or my system

  24. Rated 5 out of 5

    c y mar

    Arrived quickly and easy to replace

  25. Rated 5 out of 5

    c y mar

    Arrived quickly and easy to replace

  26. Rated 5 out of 5

    Louis Giosia

    Has worked well since i put it in

  27. Rated 5 out of 5

    Default User

    Installed in home alarm system. Works great however, we replace every 2 years.

  28. Rated 5 out of 5

    Lilmono

    Vought thia for my home alarm system main controller box that had a weak battery and was giving an trouble code. After a litter research I determined that the error was due to a bad battery pack. I replaces the battery and it was good to go. The price on was about half when the local battery store wanted. has some of the best prices around and I wouldn’t shop anywhere else.Definitely recommend this product to anyone looking for a battery replacement.

  29. Rated 5 out of 5

    Antonio Brown

    A+

  30. Rated 5 out of 5

    Web Customer

    Works.

  31. Rated 5 out of 5

    Customer

    Works.

  32. Rated 5 out of 5

    Antonio Brown

    A+

  33. Rated 5 out of 5

    George Stoffan

    Good value for the money they installed quickly receive them fast do not know about the longevity I haven’t had them for more than a couple of weeks

  34. Rated 4 out of 5

    Ronald Rushton

    Home security battery.

  35. Rated 3 out of 5

    Tanya Risinger Crook

    I ordered the wrong size , so i still have a battery low signal on my keypad. i guess i need to order a different size.

  36. Rated 5 out of 5

    Country_hick

    This was used to replace a 100% dead 8 year old battery. It works as well as expected. It provided the power needed for a respectable amount of time. I have no complaints. I expect this battery will continue to be dependable as it is still holding up well almost a year after it was purchased. For the price I would buy this battery again. These batteries are supposed to have a life expectancy of 3-5 years which I hope to surpass. When this battery has to be replaced it will have been replaced at a very reasonable yearly expense.The only issue to be aware of is look at your leads. Are the positive and negative on the correct sides of the battery? Are the terminals the small or large ones that you need? Although a smaller battery slip on connector will work to provide electricity while using a larger connector cable the larger connector cost the same money so buy the correct battery.

  37. Rated 5 out of 5

    Robert H Bertelson

    Seems to hold a charge very well.

  38. Rated 5 out of 5

    BILL CONNOT

    It is hard to give this a rating yet. The one that came with the fencer lasted over four years, not this brand. I have only had it in use for 1 month, and seems to be working great so far. I will let you know more in three years and 11 months. But I don’t think you can go wrong for the price and free shipping!

  39. Rated 5 out of 5

    Not2Available

    It fit into the device perfectly, it was fully charged and I’m happy with that.

  40. Rated 5 out of 5

    Don Bailey

    Works great in my job rocker radio.

  41. Rated 5 out of 5

    Bantypm

    Perfect replacement for our ADT alarm system. Price unbelievable.

  42. Rated 5 out of 5

    Kay Exum

    Works with my security system perfect.

  43. Rated 5 out of 5

    Kay Exum

    Works with my security system perfect.

  44. Rated 5 out of 5

    CJ

    Bought 1st Mighty Max ML5-12 six years ago for our home alarm system. Purchased this one to replace it. Met all of our system’s specs. Recommend it to others.

  45. Rated 5 out of 5

    CJ

    Bought 1st Mighty Max ML5-12 six years ago for our home alarm system. Purchased this one to replace it. Met all of our system’s specs. Recommend it to others.

  46. Rated 5 out of 5

    L. W. R.

    It work very well. Easy to install, delivery on time and not expansive. I don?t know it?s longevity but it work great for the last 3 months. I would recommend it to you.

  47. Rated 5 out of 5

    Runner/Gambler

    Works great

  48. Rated 5 out of 5

    daniel s.

    Mighty Max last forever for bilge used as bait pump

  49. Rated 5 out of 5

    Gallant

    Installed into my alarm system box and works great.

  50. Rated 5 out of 5

    Albert A.

    Needed for speaker and worked like a charm, glad it was already charged so I could test it once it was in

  51. Rated 3 out of 5

    Castoneturner E. Turner

    Put battery in and everything worked as supposed to.

  52. Rated 5 out of 5

    VK

    Prime shipping would have better option. But anyhow came as standard shipping expect the wait time, everything seems to be perfect.

  53. Rated 5 out of 5

    Daniel Ha

    I’m happy

  54. Rated 5 out of 5

    Web Customer

    Easy plug and play. I’ve had it a month now, and so far so good. My last alarm battery lasted about 20 years (though it didn’t hold much charge toward telhe end, but still did the job). Only time will tell how long this one will go.

  55. Rated 5 out of 5

    Customer

    Easy plug and play. I’ve had it a month now, and so far so good. My last alarm battery lasted about 20 years (though it didn’t hold much charge toward telhe end, but still did the job). Only time will tell how long this one will go.

  56. Rated 5 out of 5

    Web Customer

    Good

  57. Rated 5 out of 5

    FrankNC

    I have a mobile PA speaker and this battery fits perfectly. The battery came almost fully charged which is great. Price is good too.

  58. Rated 5 out of 5

    A. Med

    Was very reasonable and worked fine. Not sure how long will last but will see and maybe get back to this on it.

  59. Rated 5 out of 5

    Customer

    Good

  60. Rated 5 out of 5

    Clark in Alabama

    If a battery has any problems it will show up on a home UPS system. I have had no problems using these batteries.

  61. Rated 5 out of 5

    Anon

    Easy replacement

  62. Rated 5 out of 5

    Lakeside

    Excellent battery at good price, works great. Came faster than scheduled.

  63. Rated 5 out of 5

    FrankNC

    I have a mobile PA speaker and this battery fits perfectly. The battery came almost fully charged which is great. Price is good too.

  64. Rated 5 out of 5

    A. Med

    Was very reasonable and worked fine. Not sure how long will last but will see and maybe get back to this on it.

  65. Rated 5 out of 5

    Clark in Alabama

    If a battery has any problems it will show up on a home UPS system. I have had no problems using these batteries.

  66. Rated 5 out of 5

    Anon

    Easy replacement

  67. Rated 5 out of 5

    Elaine Barlotta

    Everything went well with my purchasing the battery for my alarm.

  68. Rated 5 out of 5

    Tightwad

    Worked in a Husqvarna mower, even though not the exact fit.

  69. Rated 5 out of 5

    D.E.

    Fits right in my Chamberlain garage door opener for battery backup

  70. Rated 5 out of 5

    D.E.

    Fits right in my Chamberlain garage door opener for battery backup

  71. Rated 5 out of 5

    Dianne Findley

    Alarm system.

  72. Rated 5 out of 5

    EESS34610

    Fast delivery exact fit

  73. Rated 5 out of 5

    Thomas

    Works just fine on my alarm system

  74. Rated 4 out of 5

    Laura C

    Got to replace security system battery. OK battery last about 2-3 years before needing replacement.

  75. Rated 5 out of 5

    N.K.

    Used product for security system. Is working fine.

  76. Rated 5 out of 5

    nancy kushnick

    Used product for security system. Is working fine.

  77. Rated 5 out of 5

    D. McRoberts

    I use this battery with wire and alligator clips to power a 12 volt 60 watt light bulb for my shed. Works as well as I wanted it to. I’ve used the light quite a lot for extended time periods and the battery is still strong.

  78. Rated 5 out of 5

    Web Customer

    Replaced battery in ALARM panal worked like original battery

  79. Rated 5 out of 5

    Customer

    Replaced battery in ALARM panal worked like original battery

  80. Rated 5 out of 5

    S. Taylor

    Perfect fit for the speaker, properly charged when received, connections were good. Happy camper…. Will update if I have issue with battery life.

  81. Rated 5 out of 5

    Web Customer

    Working gy

  82. Rated 5 out of 5

    Customer

    Working gy

  83. Rated 5 out of 5

    JCK

    The battery turned out to fit our needs perfectly and so far running great!

  84. Rated 5 out of 5

    Rosa M.

    I bought this as a replacement of my home alarm battery. I received it a day earlier than expected.It was easy to install, and although I only installed it a couple of days ago it is working as expected. I will update my review if anything changes. To date, I would recommend this product, more economical than any other battery I found locally.

  85. Rated 5 out of 5

    Ibrahim Bechara

    I was satisfied with all aspects of this purchase from . The battery is for an alarm system.

  86. Rated 5 out of 5

    Erika B

    good price, works for trailer brakes and to run interior lights (get led!) in trailer. recharge with truck alternator normally, or low amp (2ish) battery charger

  87. Rated 5 out of 5

    Ron L

    I had a low battery alert on my home alarm touch pad last month. I purchased and replaced my old back-up alarm battery with the Mighty Max. The low battery alert disappeared. Time will tell if this battery deserves the 5 star rating I gave it. I hope so since it was a reasonably priced 12V-5AH battery.

  88. Rated 5 out of 5

    John Mentz

    Perfect replacement for our security system.

  89. Rated 5 out of 5

    Des Moines G

    Perfect replacement for our Ademco security system battery. Great price and has been in place now for a couple months. Alls well!

  90. Rated 5 out of 5

    Robert Friedhoff

    Works well.

  91. Rated 5 out of 5

    Des Moines G

    Perfect replacement for our Ademco security system battery. Great price and has been in place now for a couple months. Alls well!

  92. Rated 5 out of 5

    Donald Graham

    It appears up to the job I wanted it for. Time will tell as to how long it last before charge ups are required and its durability.

  93. Rated 5 out of 5

    BossBill

    A replacement for most commercial style home alarm systems

  94. Rated 5 out of 5

    BossBill

    A replacement for most commercial style home alarm systems

  95. Rated 5 out of 5

    Mom2Michael

    Works great as a replacement for for the back-up battery for my Honeywell security system. It kept the security system powered up for over 8 hours when I did a test. The battery didn’t stop providing power; I got bored so I stopped the test.

  96. Rated 5 out of 5

    Mom2Michael

    Works great as a replacement for for the back-up battery for my Honeywell security system. It kept the security system powered up for over 8 hours when I did a test. The battery didn’t stop providing power; I got bored so I stopped the test.

  97. Rated 5 out of 5

    John Scott

    I use it to power an ice fishing finder, and this has plenty of juice to last for multiple days, but as I only use it a day at a time, it’s more the sufficient.

  98. Rated 5 out of 5

    Nitra Red

    As expected

  99. Rated 5 out of 5

    Nitra Red

    As expected

  100. Rated 5 out of 5

    Bruce

    Great for the price!

  101. Rated 5 out of 5

    J.K.

    Great price. Battery was a perfect fit for the security system contol box. Connectors were the right size. After a few minutes of being connected, the trouble light went off. Very happy so far. If the longevity is good, this will be my go to for next time.

  102. Rated 5 out of 5

    RA

    Great product. Helped me with my Alarm system battery problem. Thank you.

  103. Rated 5 out of 5

    J.K.

    Great price. Battery was a perfect fit for the security system contol box. Connectors were the right size. After a few minutes of being connected, the trouble light went off. Very happy so far. If the longevity is good, this will be my go to for next time.

  104. Rated 5 out of 5

    Calguynsac

    The battery works as described. Easy install. The ‘lowbat’ light turned off within 45 minutes and now the alarm is working great!

  105. Rated 5 out of 5

    Rachel Breeland

    Great product. Helped me with my Alarm system battery problem. Thank you.

  106. Rated 5 out of 5

    jlrrsantana

    Quality of battery is great! Installed in just a minute or two! Item received as described, except it was delivered much faster than promised! Great job!

  107. Rated 5 out of 5

    jlrrsantana

    Quality of battery is great! Installed in just a minute or two! Item received as described, except it was delivered much faster than promised! Great job!

  108. Rated 5 out of 5

    Marcia L. Stoutamire

    The battery was easy to install and arrived as promised

  109. Rated 5 out of 5

    Matt7and34

    I bought this to replace a dead battery in my Job Rocker Max speaker and it worked perfectly! The manufacturer battery had stopped holding a charge. I saw posts of people replacing the old battery with this Since the manufactur’s batteries typically die after one year. The switch out is very easy and only takes a few minutes, and now my Job Rocker Max is working like new again. Thanks Mighty Max!!!

  110. Rated 5 out of 5

    Matt7and34

    I bought this to replace a dead battery in my Job Rocker Max speaker and it worked perfectly! The manufacturer battery had stopped holding a charge. I saw posts of people replacing the old battery with this Since the manufactur?s batteries typically die after one year. The switch out is very easy and only takes a few minutes, and now my Job Rocker Max is working like new again. Thanks Mighty Max!!!

  111. Rated 5 out of 5

    GiGi

    Received about four weeks ago, plugged it in — no problems thus far. Just as good as the product costing twice as much.

  112. Rated 5 out of 5

    Elena

    Arrived as promised. It fit and worked!

  113. Rated 5 out of 5

    Shin

    It?s just a battery

  114. Rated 5 out of 5

    Wanda

    It arrived on time, easy to install, and works fine as a replacement battery for a home alarm system

  115. Rated 5 out of 5

    The Pretender

    Product received on time and fully charged. Battery was exactly as described.

  116. Rated 5 out of 5

    Big Italian

    Product was a perfect fit. Easy to hook up and fully charged when I received it. Best price anywhere and received it promptly.

  117. Rated 5 out of 5

    The Pretender

    Product received on time and fully charged. Battery was exactly as described.

  118. Rated 5 out of 5

    RadioRaccoon

    The original battery in my ion Block Rocker quit working so I ordered this one to replace it. Works as well as the original and also lasts longer as a bonus. Great replacement.

  119. Rated 5 out of 5

    luis cumana

    La mejor

  120. Rated 5 out of 5

    Joe R

    The battery was delivered on time and packaged well.It was easy to install on 10 -10- 18 and has been working fine since then.

  121. Rated 5 out of 5

    Stephen

    Inexpensive replacement battery and it works perfectly

  122. Rated 4 out of 5

    Joel Adams

    this is a backup battery, only needed when I have a power loss. It is guaranteed for five years and the last one worked for close to eight years. What can I say? I only bought the battery a month ago. I am assuming this one will work for at least seven or eight years. Check back with me in five years and I will know more.

  123. Rated 5 out of 5

    Old Retired Guy

    It fit exactly like the old battery and works great after over a year.

  124. Rated 5 out of 5

    RCJ

    Use it for my home security system works great

  125. Rated 5 out of 5

    Customer

    It fit exactly like the old battery and works great after over a year.

  126. Rated 5 out of 5

    RC

    Use it for my home security system works great

  127. Rated 5 out of 5

    72Camaro

    Came with enough power that it did not give me the low battery warning but ran as soon as hooked up.

  128. Rated 5 out of 5

    72Camaro

    Came with enough power that it did not give me the low battery warning but ran as soon as hooked up.

  129. Rated 5 out of 5

    N. L.

    Got if for out house alarm system when the old battery was not charging. It fits fine and charges OK so the battery alarm light indicator on the alarm system is gone now.

  130. Rated 5 out of 5

    A. Atta

    I needed a replacement battery, after 6 years, for my home alarm system and found this one on . Although they gave a longer delivery date, received mine VERY QUICKLY. Seemed to be fully charged because my alarm pad showed a full charge. Don’t know how long it will last, but the price was right and fit in my alarm case with no problems

  131. Rated 5 out of 5

    Dave M.

    The delivery time on this battery was terrific. The cost is very reasonable considering other suppliers, local and online. I installed immediately and working great. The important question is how long will it last. My last one purchased at a battery store lasted only two years and was over 2x more expensive.

  132. Rated 5 out of 5

    Mr. David Michael

    First class battery! Works great in my alarm system.

  133. Rated 5 out of 5

    Mr. David M. Steele

    First class battery! Works great in my alarm system.

  134. Rated 5 out of 5

    PED

    Product as promised and delivered on time.

  135. Rated 5 out of 5

    JS

    Nice Battery – Direct fit

  136. Rated 5 out of 5

    Joel B. Schwartz

    Nice Battery – Direct fit

  137. Rated 5 out of 5

    Web Customer

    Deliver on time. Small. Easy to install. Works great.

  138. Rated 5 out of 5

    Customer

    Deliver on time. Small. Easy to install. Works great.

  139. Rated 5 out of 5

    Ed_B

    Inexpensive alternative to other identical batteries costing way more. So far works great!

  140. Rated 5 out of 5

    E.

    Great price, speedy delivery, fixed the problem.

  141. Rated 5 out of 5

    RaS

    Good value and was an exact replacement for my alarm battery. It was very easy to install. Only time will tell how long it lasts.

  142. Rated 5 out of 5

    Robin Millar

    Exactly as described for a good price. Arrived promptly.

  143. Rated 5 out of 5

    John D. Evanoff II

    No problems, arrived as scheduled and exactly what I needed.

  144. Rated 5 out of 5

    Texas_Mark

    Works exactly as needed in my alarm system.

  145. Rated 5 out of 5

    Texas_Mark

    Works exactly as needed in my alarm system.

  146. Rated 5 out of 5

    Bob

    right battery for the job

  147. Rated 4 out of 5

    Simeon

    Good battery for the fire alarm system.

  148. Rated 4 out of 5

    Simeon

    Good battery for the fire alarm system.

  149. Rated 5 out of 5

    MHN

    Longevity is a major need and that won’t be known for a long time, obviously. But battery is performing just as expected.

  150. Rated 5 out of 5

    mike slaughter

    Great product , fast shipping!!

  151. Rated 5 out of 5

    RWB

    Needed a new backup battery for my Honeywell Vista 20 alarm panel. Ordered this one from Mighty Max Battery. Perfect fit. Works like a charm. Super Fast Shipping.

  152. Rated 5 out of 5

    RWB

    Needed a new backup battery for my Honeywell Vista 20 alarm panel. Ordered this one from Mighty Max Battery. Perfect fit. Works like a charm. Super Fast Shipping.

  153. Rated 4 out of 5

    George

    Works Good.

  154. Rated 4 out of 5

    George

    Works Good.

  155. Rated 5 out of 5

    bill_va

    Exactly what I expected.

  156. Rated 5 out of 5

    ExecSec45

    Item arrived ahead of time and was immediately installed in my home alarm system by ADT. Worked perfectly and still does. Very happy with purchase and will buy again when needed.

  157. Rated 5 out of 5

    Hoke

    Battery is as advertized. Fit my alarm and weak battery warning is gone.

  158. Rated 5 out of 5

    OsCarolB

    Perfect for Vista 20p cabinet, easy install.

  159. Rated 5 out of 5

    OsCarolB

    Perfect for Vista 20p cabinet, easy install.

  160. Rated 5 out of 5

    William Scalise

    Nice little battery

  161. Rated 5 out of 5

    Mark Dubuque

    Easy replacement for my vista 20p. Works as expected

  162. Rated 5 out of 5

    Misty M.

    Works great with my vista system.

  163. Rated 5 out of 5

    Bill

    A+++++

  164. Rated 5 out of 5

    Web Customer

    • ML5-12 – 12V 5AH Alarm System Battery Back Up Vista 20P ADT

  165. Rated 5 out of 5

    Customer

    ? ML5-12 – 12V 5AH Alarm System Battery Back Up Vista 20P ADT

  166. Rated 5 out of 5

    Clint Allen

    Perfect fit for my security system backup power

  167. Rated 5 out of 5

    Iqbal khan

    worked as advertised.

  168. Rated 5 out of 5

    MK

    very good

  169. Rated 5 out of 5

    R K

    The previous owner had installed a 7AH battery but this was a drop-in replacement.

  170. Rated 5 out of 5

    R K

    The previous owner had installed a 7AH battery but this was a drop-in replacement.

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