ML3-12 – 12V 3AH Replacement Battery for APC BACK-UPS ES350

(65 customer reviews)

From: $18.99

ML3-12 – 12V 3AH Replacement Battery for APC BACK-UPS ES350

SKU: ML3-12106710 Category:
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$ 33.99
$ 46.99
$ 59.99
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Delivering power when you need it, the Mighty Max ML3-12 12 Volt 3 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 ML3-12 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: 3 AH
Chemistry: SLA, AGM
Terminal: F1
Battery Dimensions: 
5.28 in x 2.64 in x 2.64 in
Weight: 3.20 Lbs
Warranty
1 Year
Multi Packs Bundled Savings

1 Pack, 2 Pack, 3 Pack, 4 Pack, 6 Pack, 10 Pack

Volts

12V

Amp Hour

3Ah

Chemistry

SLA / AGM

Terminal

.187" – F1

Quantity

1

Length

5.28

Width

2.64

Height

2.64

Weight

3.20 Lbs

Warranty

1 Year

65 reviews for ML3-12 – 12V 3AH Replacement Battery for APC BACK-UPS ES350

  1. William G McKnight

    They work.

  2. Don Waterfield

    Top quality. Fast ship.

  3. Kenneth Kessler

    It’s just a battery replacement. I plugged it in and it worked. Longevity is unknown.

  4. Javier Ruiz

    Bought this battery to replace an old one in my APC Back Ups es350. It is about 40% cheaper than the name brand, and it is replacing another battery from this same brand that lasted me for about 3.5 years, so not too bad. Here in Florida brownouts and power spikes due to electrical storms and grid issues are very commonplace, so I have 4 of these protecting my AV equipment, computer, router and NAS. As long as this company keeps making these quality batteries at affordable prices, I will keep buying them to protect all my sensitive electronics!

  5. ohmy

    Timely delivery, is what I ordered, and fit was perfect.

  6. George Totolos

    I put this battery in an APC UPS end it only lasted 11 months. We probably lost power two or three times for less than 15 minutes total. I guess you get what you pay for.

  7. Michael Jensen

    Great customer service and a very good battery. I’ve purchased several for my various UPS devices and they all work great.

  8. D. Holbrook

    Works and fits just as well as OEM battery.

  9. Yamir M

    The battery was as described. It fit perfectly into the surge protector. The battery was promptly delivered. They have great customer service.

  10. Brian B. Smith

    Battery Back up replacement battery

  11. Lone Funman

    Found a 20-yo APC Back-UPS unit while moving. Installed this very reasonably-priced replacement battery. Works perfectly. Not only recommend the battery, as it is clearly built to spec and functions very well, but kudos to APC Back-UPS for their very forward-working, long-lasting design and tech.

  12. Texas Reader

    I have been a repeat customer for Mighty Max batteries because the batteries arrive on time and have a good lifespan as replacement batteries in UPSs.

  13. John W Amidei

    Shipped fully charged and worked great

  14. Kefer

    I just connected it to mower right out of the box, and it fired up mower right away. I did plug in the charger then and got a full charge according to light on charger. Seems to be holding charge ok so far. I haven’t used it under regular mowing time.

  15. Joy Pershing

    They are fine. Thanks

  16. David

    It worked just like the original

  17. Robert Ortega

    Need a battery and the price was worth it

  18. Marty

    Replaces OEM battery. Fits physically. The terminals are narrower than the original battery. It would be better if they were the same as original but the wires stay on. Battery seemed to charge up OK. Did not do a thorough load test.

  19. Rick-SPC

    I purchased this item as a replacement battery for my APC ES350. The battery is about 1/16 of an inch TOO big, and does not fit in the battery compartment.The lines reach the terminals, but the unit does not balance on the battery because the compartment is off-center.Obviously, I am not 100% satisfied. Waiting for a reply from their service department.

  20. RMC

    Simple DIY replacement for my wife’s Samsung 2010 10 tablet. Included tools were flimsy, but install went without issue. Be careful and you’ll get it down in under 30 minutes. Battery performance seems to be good over the past 6-months, too.

  21. Jorge C. Alvarez

    Got within a week, it took 5-10 min. to install and is working as describe.

  22. Vance Jochim

    This is probably the third time I have replaced the battery in this older APC unit over the years. I use it for just a Comcast internet router and HD-homerun device. The batteries usually last about 3-years and the UPS is important in Florida where we get storms, tornadoes and high winds that knock out the power without notice. This is the first time I have used this brand so will update this report if the life is not long enough. When you replace batteries, always write the date and cost on the battery so you know how long the battery lasted when the unit starts failing. FYI – I also use a bigger UPS for my main desktop, plus another E-350 for a two drive Synology NAS and a couple of other external hard drives used as Plex servers for over the air recorded movies and TV shows. There is no better satisfaction like watching a DVR captured video with all the equipment on, and a storm knocks the power out for 3 minutes and none of the equipment stops. I don’t connect the printer to the larger UPS (which is at least 20 years old) but do connect TWO large monitors (27 & 32) to it plus a desktop tower with an i7 Intel loaded PC and two rotating drives and two NVMe SSD’s. So now you know why YOU need at least one UPS backup unit for your PC rig, and know what replacement battery you need and where to order it BEFORE older batteries fail.

  23. Vance Jochim

    This is probably the third time I have replaced the battery in this older APC unit over the years. I use it for just a Comcast internet router and HD-homerun device.The batteries usually last about 3-years and the UPS is important in Florida where we get storms, tornadoes and high winds that knock out the power without notice. This is the first time I have used this brand so will update this report if the life is not long enough. When you replace batteries, always write the date and cost on the battery so you know how long the battery lasted when the unit starts failing.FYI – I also use a bigger UPS for my main desktop, plus another E-350 for a two drive Synology NAS and a couple of other external hard drives used as Plex servers for over the air recorded movies and TV shows.There is no better satisfaction like watching a DVR captured video with all the equipment on, and a storm knocks the power out for 3 minutes and none of the equipment stops. I don’t connect the printer to the larger UPS (which is at least 20 years old) but do connect TWO large monitors (27 & 32) to it plus a desktop tower with an i7 Intel loaded PC and two rotating drives and two NVMe SSD’s.So now you know why YOU need at least one UPS backup unit for your PC rig, and know what replacement battery you need and where to order it BEFORE older batteries fail.

  24. Joe

    works great A++

  25. Joe

    works great A++

  26. Mitchell Ross

    Direct replacement for the PowerStar PS12-3.3 in an APC Back-UPS ES 350. Fits and operates perfectly! No issues

  27. Mitchell Ross

    Direct replacement for the PowerStar PS12-3.3 in an APC Back-UPS ES 350. Fits and operates perfectly! No issues

  28. docm

    This was a battery for an old UPS that I am now using to protect my TV, Apple TV, recording device and stereo system. Basically one has to install the battery with the terminals down and the wires underneath the battery. They are tricky to keep on.

  29. docm

    This was a battery for an old UPS that I am now using to protect my TV, Apple TV, recording device and stereo system.Basically one has to install the battery with the terminals down and the wires underneath the battery. They are tricky to keep on.

  30. isaac m.

    works great

  31. Larry Lee

    Very slightly larger then the factory bat. out of My ES 350

  32. S. Matthyssen

    Good product good value but best customer service and would gladly do business with them again. Trustworthy seller!!

  33. DukeMD69

    A perfect replacement for my battery powered tire inflator/compressor. Actually, I’ve owned this compressor for many years. When the battery dies, it is impossible to recharge it. It is supposed to be discarded. Not me. I took it apart, and replaced the dead battery. This one fit perfectly. Now, I’m back in the saddle. I guess I grew up in an era where a DIY attitude was prevalent.

  34. Richard Soh

    Fast shipping, perfect match at a discount.

  35. E. E. Saulsberry

    Unit installed easily, looks and specs just like the OEM battery. Working fine. Only time will tell about longevity.

  36. P. Pereira

    It was just what I needed to make my APC UPS work again

  37. Nairokrikb

    This product is a direct replacement of the ES-350 OEM battery. Key features are the physical size and terminal size, which required no modification to replace the original battery.

  38. Nairokrikb

    This product is a direct replacement of the ES-350 OEM battery. Key features are the physical size and terminal size, which required no modification to replace the original battery.

  39. Trevor M.

    Pulled apart the battery backup, got the product number and this was an exact fit. Works great!

  40. Rational

    Perfect fit and easy to install. It’s been working fine for weeks.

  41. Tom Lewis

    Good Value for money & Easy to install and quick delivery

  42. Tom Lewis

    Good Value for money & Easy to install and quick delivery

  43. D. Miller

    Good value and it works.

  44. Carl Jerris

    It does what it says and at a good price.

  45. Roy S Canter Jr

    Item as described plus fast shipping.

  46. Joel

    Fit perfect

  47. John Baker

    Exactly what I needed, thanks.

  48. muriel abel

    Loved it

  49. once n a while

    Well packaged and charged, ready to go. Used as a UBS replacement battery and works great.

  50. Bruce Williams

    The battery is exactly what I needed. The battery has been working great.

  51. Customer Person

    The battery arrived in good time and was simple to replace. This battery seemed to be about the best deal. I was glad I could swap out the battery to my backup power unit rather than buy a whole new device at more than twice the cost.

  52. Customer

    The battery arrived in good time and was simple to replace. This battery seemed to be about the best deal. I was glad I could swap out the battery to my backup power unit rather than buy a whole new device at more than twice the cost.

  53. W. Slupe

    Bought as a replacement for 9 year old battery that died in an APC unit. Seems to be working okay.

  54. Jomez

    Got a couple about 5 mo ago and they have worked perfectly. The Mighty Max support was great too. Online batteries are always suspect on quality but these guys have a good product!

  55. Vince

    It’s a battery. We’ll see how fast it drys up. Then it’ should get a review.

  56. Dallas E.

    Long story with happy ending: Over a period of years, all five of my APC (home use) units required battery replacements. Replaced the first bought direct from APC. Paid 2/3 cost of the whole unit on OEM batteries, and they wanted me to hassle returning the cores. …so all future are MightyMax. Read reviews (thank you contributors) of aftermarket with great quality for greatly reduced cost of originals and luckily chose MightyMax. I’m now loyal MightyMax Powered customer on APC backup on my two PC’s as well as three flat screen HDTV’s. Note: I’m on west coast and MightyMax ships promptly from east coast with their free freight default USPS, so allow reasonable transit time or pay extra for expedited.

  57. Robert Gunderson

    It fit and it worked as expected.

  58. Mark S

    Fit my apc perfect.

  59. Pandorum

    I guess I should have bought the OEM replacement battery for the APC UPS that I have used for some time. But … well, this one was cheaper and works just fine.

  60. SteveO

    Works like an APC brand battery​ at 75% the cost. So far so good.

  61. SteveO

    Works like an APC brand battery​ at 75% the cost. So far so good.

  62. Wayne A Parsons

    Fit perfectly for the product

  63. Wayne A Parsons

    Fit perfectly for the product

  64. William C. Teng

    Great product with a great price!

  65. William C. Teng

    Great product with a great price!

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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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