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

(170 customer reviews)

From: $17.99

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
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$ 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. Barbara

    Both value and speed of delivery.

  2. R. Nero

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

  3. Sohappy

    Fast shipping, works well.

  4. Tom Buford

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

  5. R U IRIE

    Excellent replacement for the one in the security system –

  6. Anthony Sloterdijk

    Perfect size

  7. adam wiseman

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

  8. 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. 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. 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. 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. Roger

    Great replacement battery

  13. 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. 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. Btrandell

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

  16. 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. R Otts

    Used for alarm system backup.

  18. Timothy E West

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

  19. Laurette V.

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

  20. Laurette V.

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

  21. Tony S

    It was bought as a spare.

  22. JULIO PICHS

    Convenient or my system

  23. JULIO PICHS

    Convenient or my system

  24. c y mar

    Arrived quickly and easy to replace

  25. c y mar

    Arrived quickly and easy to replace

  26. Louis Giosia

    Has worked well since i put it in

  27. Default User

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

  28. 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. Antonio Brown

    A+

  30. Web Customer

    Works.

  31. Customer

    Works.

  32. Antonio Brown

    A+

  33. 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. Ronald Rushton

    Home security battery.

  35. 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. 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. Robert H Bertelson

    Seems to hold a charge very well.

  38. 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. Not2Available

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

  40. Don Bailey

    Works great in my job rocker radio.

  41. Bantypm

    Perfect replacement for our ADT alarm system. Price unbelievable.

  42. Kay Exum

    Works with my security system perfect.

  43. Kay Exum

    Works with my security system perfect.

  44. 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. 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. 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. Runner/Gambler

    Works great

  48. daniel s.

    Mighty Max last forever for bilge used as bait pump

  49. Gallant

    Installed into my alarm system box and works great.

  50. 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. Castoneturner E. Turner

    Put battery in and everything worked as supposed to.

  52. VK

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

  53. Daniel Ha

    I’m happy

  54. 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. 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. Web Customer

    Good

  57. 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. 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. Customer

    Good

  60. 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. Anon

    Easy replacement

  62. Lakeside

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

  63. 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. 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. 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. Anon

    Easy replacement

  67. Elaine Barlotta

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

  68. Tightwad

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

  69. D.E.

    Fits right in my Chamberlain garage door opener for battery backup

  70. D.E.

    Fits right in my Chamberlain garage door opener for battery backup

  71. Dianne Findley

    Alarm system.

  72. EESS34610

    Fast delivery exact fit

  73. Thomas

    Works just fine on my alarm system

  74. Laura C

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

  75. N.K.

    Used product for security system. Is working fine.

  76. nancy kushnick

    Used product for security system. Is working fine.

  77. 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. Web Customer

    Replaced battery in ALARM panal worked like original battery

  79. Customer

    Replaced battery in ALARM panal worked like original battery

  80. 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. Web Customer

    Working gy

  82. Customer

    Working gy

  83. JCK

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

  84. 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. Ibrahim Bechara

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

  86. 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. 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. John Mentz

    Perfect replacement for our security system.

  89. 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. Robert Friedhoff

    Works well.

  91. 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. 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. BossBill

    A replacement for most commercial style home alarm systems

  94. BossBill

    A replacement for most commercial style home alarm systems

  95. 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. 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. 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. Nitra Red

    As expected

  99. Nitra Red

    As expected

  100. Bruce

    Great for the price!

  101. 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. RA

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

  103. 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. Calguynsac

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

  105. Rachel Breeland

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

  106. 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. 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. Marcia L. Stoutamire

    The battery was easy to install and arrived as promised

  109. 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. 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. GiGi

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

  112. Elena

    Arrived as promised. It fit and worked!

  113. Shin

    It?s just a battery

  114. Wanda

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

  115. The Pretender

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

  116. 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. The Pretender

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

  118. 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. luis cumana

    La mejor

  120. 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. Stephen

    Inexpensive replacement battery and it works perfectly

  122. 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. Old Retired Guy

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

  124. RCJ

    Use it for my home security system works great

  125. Customer

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

  126. RC

    Use it for my home security system works great

  127. 72Camaro

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

  128. 72Camaro

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

  129. 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. 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. 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. Mr. David Michael

    First class battery! Works great in my alarm system.

  133. Mr. David M. Steele

    First class battery! Works great in my alarm system.

  134. PED

    Product as promised and delivered on time.

  135. JS

    Nice Battery – Direct fit

  136. Joel B. Schwartz

    Nice Battery – Direct fit

  137. Web Customer

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

  138. Customer

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

  139. Ed_B

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

  140. E.

    Great price, speedy delivery, fixed the problem.

  141. 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. Robin Millar

    Exactly as described for a good price. Arrived promptly.

  143. John D. Evanoff II

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

  144. Texas_Mark

    Works exactly as needed in my alarm system.

  145. Texas_Mark

    Works exactly as needed in my alarm system.

  146. Bob

    right battery for the job

  147. Simeon

    Good battery for the fire alarm system.

  148. Simeon

    Good battery for the fire alarm system.

  149. 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. mike slaughter

    Great product , fast shipping!!

  151. 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. 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. George

    Works Good.

  154. George

    Works Good.

  155. bill_va

    Exactly what I expected.

  156. 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. Hoke

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

  158. OsCarolB

    Perfect for Vista 20p cabinet, easy install.

  159. OsCarolB

    Perfect for Vista 20p cabinet, easy install.

  160. William Scalise

    Nice little battery

  161. Mark Dubuque

    Easy replacement for my vista 20p. Works as expected

  162. Misty M.

    Works great with my vista system.

  163. Bill

    A+++++

  164. Web Customer

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

  165. Customer

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

  166. Clint Allen

    Perfect fit for my security system backup power

  167. Iqbal khan

    worked as advertised.

  168. MK

    very good

  169. R K

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

  170. R K

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

Only logged in customers who have purchased this product may leave a review.

Mighty Max Battery
Excellent
4.8
Based on 452 reviews
Mighty max brings the battery backup back.
Arrived well packed in unopened sturdy box. Was replacement for identical Mighty Max battery I ordered 2 years ago. Taking 1 star off because didn’t include the needed terminal clips - was able to use the old battery’s clips
Same model fits in each of our four wheelers great product
Replacement for my Murray MT100 riding lawnmower. Murray does not make replacement batteries and you are on your own if the battery goes bad. Bought Murray MT100 in 2023, battery went bad in 1 year and all other Murray replacement batteries are LARGER so it won't fit.This Mighty Max Battery fit the MT100 fine and it starts it perfectly too.
Direct replacement for generac portable electric start generator. Works great.
Received really quick. Boxed well and fit great. Worked like a charm! I would definitely recommend this battery.
As an athletic trainer I rely on our water units every day to provide the water to our athletes. We have over 900 student athletes enrolled, and these units get used daily, so it is imperative these batteries are reliable. On a side note, I also use these batteries on my fishing kayak to power my fish finder. I can use my fish finder for about 20 hours before it turns off. These batteries are great! Highly recommend. I have not had any issues so I haven't spoken to customer service yet, but if they are as good as these batteries have been, I think I am in good hands.
Needed a replacement battery and the manufacturer wanted $50 whereas you only required $20. Made it worth it!
satisfy with price and easy installation.
Arrived in great condition comes with the bolts to attach the wire over all very satisfied
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