Delivering power when you need it, the Mighty Max ML75-12 12 Volt 75 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 ML75-12 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: 75 AH
Chemistry: SLA, AGM
Battery Dimensions:
10.24 in x 6.61 in x 9.06 in
Weight: 50.71 Lbs
Warranty
1 Year
Michael Lueth (verified owner) –
Arrived fully charged and ready to hook up, including the nuts and bolts fasteners for attaching the cables. It was shipped in a heavy cardboard box with interior cardboard and styrofoam fillers for added protection during shipping. Looks exactly like the battery it’s replacing.
MarkyMark –
I bought this battery in Nov 2018 and its August 2022 as i write this. I’ve 50% discharged this battery, 5 days a week ever since purchasing it and its still going strong.
David –
There was nothing to dislike about these batteries. I Purchased to to replace the batteries in my mobility scooter.
Bill –
I can confirm that this also works with Wayne WSS30VN Upgraded Combination 1/2 HP and 12-Volt Battery Back Up System , Black. It fits in the provided battery case, which is a problem for some other batteries. The terminals are a little tricky to hook up but it is a minor issue. In use for 3 months so far with no battery health issues.
NairS –
Came with all the hardware to connect Wayne backup sump pump. Full charge out of box. Item as described.
Pete P. –
I bought this in March of 2016 for my Wayne ESP25 back up sump pump. It came on once in that time period when my main pump broke a few years ago. I test it 5 times a year and it works every time. After this last test it does not pump water it only hums. I tested the voltage and it is 13.6V however when the pump runs the voltage drops to 9.5V. I think this drop is too large and the battery is weak. I have ordered a new one because it lasted over 5 years and for the price this is good.
Web Customer –
Great pump
true1shot –
Delivery was in time. Haven’t had it long enough to see if it value for the money or how long it lasts. But so far it’s ok! I’ve had it a month hooked up to my back up sump.
Karen Harris –
It was fine…very heavy but easy installation
kwcarguy –
I installed two of these in my RV and so far am quite impressed. I am writing this review almost a year after the install because I was blown away by the complete lack of self discharge on these batteries. I have them wired to a switch that cuts power to everything but the battery monitor and after 6 months of a long, pacific northwest winter in storage with extended temps in the single digits they are reading 98% charge still ! This is by far the BEST performance for self discharge rate over a winter of any battery I have ever owned. Including the much more expensive Optima blue tops in my boat. These will be my Go to from now on.
Tony –
Good
DJ –
Use it with a 55lb trolling motor works great all day. Recharges well.
yO –
I really didn’t wanna pull the trigger on 139 Bucks,,but,,This thing delivers..PERIOD!Using it with a simple 20 Watt solar Panel to keep it topped off…Drives my Bestek1000 Watt inverter which drives many appliances around the house. Easily refills the stealth 1 gallon air compressor. A deffinate nice mini power outage simple settup.This battery will literally and figuratively have your back .. just be careful when lifting THOR’s Hammer…lol
Rob –
I hooked this up to a Wayne WSS30VN, it worked perfectly. Easy to install and it fit in the box with ease, anyone can do it with zero experience with batteries. I highly recommend this battery for a sump pump battery backup.
Erica –
Actually a very good battery. I bought two of them and the one malfunctioned (which was my fault). The Achilles heel of the product is the cheap handles, which are cheap plastic. Out of the 2 batteries 3 have broken. I called might max to get a replacement and they said they didn’t have any and can’t get any from the manufacturer in China. So I will not buy from them again
Web Customer –
Price was spot on also liked the built in handles on the battery which made it easy to install in my battery rack in my garage for my solar system that supplies power for my outside lighting in my home
Customer –
Price was spot on also liked the built in handles on the battery which made it easy to install in my battery rack in my garage for my solar system that supplies power for my outside lighting in my home
Web Customer –
Good performance in my emergency communications application.
Customer –
Good performance in my emergency communications application.
Rocky Mountain Marty –
I purchased this battery as a replacement for my Wayne back-up sump pump original battery. I spent hours researching a suitable deep cycle battery that would meet the 75Ah specs and equally important, fit properly in the OEM Wayne battery case/charging system. This one fits perfectly in the case and it is very reasonably priced. Also, it is good to know that you can take your old battery to one of the major auto parts chain stores and get $10 for recycling the core. I am very pleased with the purchase so far and time will tell how long it lasts. The original battery was significantly more expensive and lasted 5 years on standby float charge.
Rocky Mountain Marty –
I purchased this battery as a replacement for my Wayne back-up sump pump original battery. I spent hours researching a suitable deep cycle battery that would meet the 75Ah specs and equally important, fit properly in the OEM Wayne battery case/charging system. This one fits perfectly in the case and it is very reasonably priced. Also, it is good to know that you can take your old battery to one of the major auto parts chain stores and get $10 for recycling the core. I am very pleased with the purchase so far and time will tell how long it lasts. The original battery was significantly more expensive and lasted 5 years on standby float charge.
Triple –
Looks good. Works good with the system. Hopefully it lasts a while.
Ryan Hunker –
Using as a battery backup for a sump pump. It has held its charge and is a fraction of the cost of some of the other batteries I looked at. Will purchase again when the time comes
William M. –
These battery is great I wet conditions
Paul Blank –
Good battery . Heavy
Sean Sanczel –
This battery arrived on time, packaged well and is a great, trouble-free battery for my back up sump pump.
Sean Sanczel –
This battery arrived on time, packaged well and is a great, trouble-free battery for my back up sump pump.
martha –
works like a charm
Web Customer –
Works great with no problems
Customer –
Works great with no problems
Terrence J. Ronczkowski –
Good cheaper replacement
Terrence J. Ronczkowski –
Good cheaper replacement
Cam –
Money well spent. Saved my basement.
JRB –
Battery was very easy to set up and connect to my Wayne back-up sump pump system. Also fits nicely in the battery container supplied by Wayne. So far everything is working well. Also love that it is maintenance free, unlike the battery that I had for my previous Basement Watchdog system. Time will tell but this battery is a great value over the much more expensive one sold by Wayne. Will hopefully last 4-5 years.
Blargh –
Mighty Max makes GOOD batteries. I have about a dozen of them for various projects and they work well. I had ONE that developed a leak and Mighty Max replaced it in 2 days, so they do stand behind their warranty.I’ve owned other AGM batteries but not any more. I’m sticking with Mighty Max.
happy customer –
The battery arrived promptly and in excellent condition. I used it with a Wayne back up sump pump. It fit in the battery case and all connections were easy. It was a great value and about a $100 less than the Wayne battery recommended.
happy customer –
The battery arrived promptly and in excellent condition. I used it with a Wayne back up sump pump. It fit in the battery case and all connections were easy. It was a great value and about a $100 less than the Wayne battery recommended.
Carl Schaller –
well made, should last many years
Dave Apotheosis –
Very heavy
Web Customer –
Like
Customer –
Like
Louis Affeldt –
Ran a backup sump pump during power outage two days after installation. Money well spent.
MAGO’S KAYAK –
IF YOU ARE LOOKING FOR SOMETHING THAT REALLY LASTS THE CHARGE IN YOUR TROLLINH MOTOT AND FISH FINDER. THIS IS THE BATTERY THAT NESECITAS. I RECOMMENDED YOU BY WEIGHT. DURABILITY. MAGO’S TEAM KAYAK’S
Pelican Pete –
Used it twice on 50lb trolling motor and it held up and was strong for over 4 hours.
ryan –
It’s a battery. It either works or it doesn’t. This one worked great for my Wayne back up sump pump. Great price compared to others it’s size and Amp hours. Easy hookup. Came with necessary hardware for standard ring terminal.
ryan –
It’s a battery. It either works or it doesn’t. This one worked great for my Wayne back up sump pump. Great price compared to others it’s size and Amp hours. Easy hookup. Came with necessary hardware for standard ring terminal.
Benjamin L Strote –
Great product. Much cheaper option than others But not cheap. I would buy this again.
B Brown –
I bought this battery to go along with the Wayne WSS30Vn Combo Battery Backup System. The battery box that comes with WSS30Vn is supposed to be for a 27 frame marine battery but the controller is built into the box. This restricts the available space for the battery. Many off the shelf batteries don’t fit properly in the battery box because there too tall. This one does fit and also has comes with the necessary hardware. Everything tested out fine after installation but its only been a month so far. I haven’t been through any crazy storms yet that would put the battery to the ultimate test. So far so good. FYI this battery is heavy, like 48 lbs heavy, so be careful.
Todd A Whited –
Works great
Linda Gulick –
Great product and would recommend purchase.
J W G –
I bought my Jazzy 1450 used and the batteries were a little worn out from the get go. I let them get pretty much totally useless before finally pulling the trigger on a new set. After quite a bit of research, I went with these and am so glad I did. It is so cool to have the power that you need for any incline or terrain (approved for the chair). I can’t speak to longevity, but out of the box, they are every bit the power you pay for and then some. Very pleased.
J W G –
I bought my Jazzy 1450 used and the batteries were a little worn out from the get go. I let them get pretty much totally useless before finally pulling the trigger on a new set. After quite a bit of research, I went with these and am so glad I did. It is so cool to have the power that you need for any incline or terrain (approved for the chair). I can’t speak to longevity, but out of the box, they are every bit the power you pay for and then some. Very pleased.
Stephen W. Urdzik –
Great battery for the price
Stephen W. Urdzik –
Great battery for the price
Russell E Nagy –
OK, you need a backup sump pump and you can’t afford to mess this up. It’s a little expensive and damn heavy, but, this battery is all that and a bag of chips. I trust it completely and it has (on, at least, the first occasion) kicked it without any sign of losing charge,
Russell E Nagy –
OK, you need a backup sump pump and you can’t afford to mess this up. It’s a little expensive and damn heavy, but, this battery is all that and a bag of chips. I trust it completely and it has (on, at least, the first occasion) kicked it without any sign of losing charge,
jkish –
Good Value for the price , Bought it for my wayne battery back up sump pump
Paul Fugitt –
Will not hold a charge very long , takes forever to recover and take a charge . Discharge rate seems to be 1/2 the rating
Mr. Paul Fugitt –
Will not hold a charge very long , takes forever to recover and take a charge . Discharge rate seems to be 1/2 the rating
Web Customer –
Quick delivery, working fine.
Customer –
Quick delivery, working fine.
Web Customer –
Got for back up for CPAP seems to work
Customer –
Got for back up for CPAP seems to work
TrainTec –
The delivery was quick, and got here before the allotted time. The packaging was secure, and it came undamaged. I installed this unit, and it fit well in the battery case. It has flip up handles on the battery for ease of installation. It comes with the hardware needed to hook up the wires. I have a battery monitor and it is holding a charge well. I tested my back up pump system, and this battery drives it with no problem, plenty of power to pump. I have read other reviews that this battery held up well during a 24 hour power outage during a rain event. We will see how long it lasts. I will update if I have any problems down the line, but so far I am very pleased.
Web Customer –
I have this on my Wayne pump backup sump. Does the job
Customer –
I have this on my Wayne pump backup sump. Does the job
Brandon Luedeke –
Great battery. Came fully charged.
Frank –
Green lights all around.
mark donnelly –
This is a very well built battery. Holds a charge for a long time. Great for a trolling motor. Had a problem with shipping and there customer service was quick in resolving it.
Doug Vohden –
Good value and product quality
Michael –
Came very well packaged and fully charged at 13.5 volts. Fits with plenty of room to spare in the Wayne WSS30V combo sump pump. Hope that it will last at least several years.
Derrick –
Keep in mind these delivery guys never keep it right side up when shipping, but it didn’t seem to affect anything and it’s installed into my backup sump system and works fine.
Ciboney –
Totally recommend the battery as it fits perfectly in the case, and it brings all necessary items to connect it the the pump. No complaints thus far, pretty happy with the purchase.
GenZen –
Came fully charged, tested it and it works without any issues with my Wayne WSS30V (bought elsewhere). Hopefully it will work during emergencies.
David D Duncan –
great battery. reads 13.9 when fully charged.
D. Gross –
I give it five stars because it arrived before the due date, packaged well. It hooked up easily to my Wayne back up sump pump as advertised that it would do. It came fully charged and when we tested out the backup pump everything worked as it should and the battery kicked in with no problem. I can’t say any more than this at this time, and honestly hope that I never have to say anything more! It is difficult to write a review about a product that you purchase in hopes that you never ever had to use it! However, I feel secure now that my basement is protected by the whole system and by this battery that was less expensive than the others I looked at and works very well with the system I purchased.
Tom –
finally got to use yesterday, several hours of near constant use of 24 volt trolling motor, plenty of charge left. love these batteries
John S. Kjellman –
Bought this battery for use with a Wayne EPS-25 battery backup sump pump. It fits in the case with plenty of room to spare and though I’ve only had it a short time looks well made.
OZ –
Great product!
OZ –
Great product!
Rough Riders –
Working good so far…no complaints
d stock –
very fast shipping. I received the battery with a full charge 12.8 volts and is working good in my class C motor home.I charge it with a 100 watt solar panel. so far so good.
steve –
I’ve had this this March. Still seems to be holding a good charge….no issues to speak of. Nice pack job by the way.
Bill S. –
The Mighty Max 75ahr SLA battery is great! I use this battery to power a 45lb trolling motor on my kayak. The battery just fits into the back hatch on my Jackson Big Rig. I’ve used this battery only twice since acquiring it but, both times this has performed excellent. Runs all day on a charge with a little left over. Only drawback I can think of, it’s 50lbs. The only alternative is a lithium battery for at least $600-$700+ that weighs 2/3 less. Great battery.
Cioaca –
I bought a WAYNE ESP25 back up sump pump and the Mighty Max battery exactly 2 years ago. The real test was yesterday when I lost power and rained for 2 days. The pump and battery performed excellent for the 24 hours I had no power. The pump started every 2 minutes. I was worried about the battery, but after 24 hours of pumping approximately every 2 minutes the charging indicator for battery was still on the green.I am very happy with the battery and the pump.
William C. Dreisbach –
This came well packaged but beware – it is quite heavy. It should do its job as my sump pump backup source. I’m expecting 7 years of so life, so if/when it fails I’ll edit this review and let everyone know (purchased Mar 2018). As it is a plug in and forget device, I don’t expect anything but I will test it at least annually.It seems to be well built and has nice fasteners for the terminals, and fit in the battery box I got with the sump pump.I didn’t put it on a load and verify the capacity or anything like that – a more extensive reviewer would do that.
richard D. Yeakey –
Worked very well with my system.
MugenTitan –
Got it for the ESP25. Worked off the box as soon as I hooked it up. Will be testing again after 6 mos. So far so good.
Frank L. Houdek –
Using it for 2 1/2 months in RV trailer with 100 watt solar panel. Stays at 13.6 volts. Think it will be a good purchase.
D Scheer 3 –
Great battery with solid handle, and fantastic customer service. I’ll be keeping my eyes open for Mighty Max products!
RayR –
Delivery was on time! The instructions were very simple. Works well.
lannie –
Works as expected
lannie –
Works as expected
New Jersey –
Thankfully, I haven’t needed to use this backup battery but it looks like it will do the job if necessary.
Web Customer –
I just installed it a few weeks ago, so time will tell as to the quality of this battery. So far it seems to work well with the Wayne ESP25 unit. The price was good and the delivery was quick. Hopefully, this battery will perform well for many years.
Customer –
I just installed it a few weeks ago, so time will tell as to the quality of this battery. So far it seems to work well with the Wayne ESP25 unit. The price was good and the delivery was quick. Hopefully, this battery will perform well for many years.
Vanessa Pearson –
So far so good. It hasn’t been used yet.
Justin Stanbro –
I bought this for a Wayne WSS30V sump pump kit (which includes the ESP25 backup pump). The first battery arrived quickly, but was dead on arrival. Mighty Max customer service was great and helped me get a replacement in just a few days. I had no problems with the exchange. Hooked up the new one and it worked with the pump without issue. I’m only leaving 4 stars right now because I don’t yet know how the battery will fare long term. But so far I’m happy.
Marc –
Very good battery. I used this with the Superior Pump 92900 backup kit and it fit perfectly in the battery case. Good shipping and was well protected from damage during shipping. Ever has a nice carrying rope that made moving this a breeze. I would recommend this highly and was a good price at $140 at the time of this review.
Dbltake in Illinois –
Strong and very sparky.
Web Customer –
Only lasted 5 1/2 months not the year they were guaranteed for. They said I needed to put them back in the original boxes with all original packing. Nobody keeps that for that lone. They also said I had to pay shipping. Buy from them at your own risk.
Customer –
Only lasted 5 1/2 months not the year they were guaranteed for. They said I needed to put them back in the original boxes with all original packing. Nobody keeps that for that lone. They also said I had to pay shipping. Buy from them at your own risk.
Phillip –
Works as advertised.
Phillip –
Works as advertised.
Zhuldyz T. –
It is a good battery, sealed and non leaking. It is however smaller than the Wayne battery.That means less capacity for a long period of backup in case such emergency should happen.
Tim Green –
Delivery was pretty good, I think, for a big heavy battery – ordered on a Sun, Got it on Thu. Battery came with nuts and bolts for the posts. What can I say – it’s a battery.
Ryan S Cohen –
Powered our Wayne ESP25 Back-Up Sump pump (which ran once every 10 minutes regularly) for 48 hours straight and the battery charge never changed from green. Great back-up battery for the following sump-pump:Sump-pump: WAYNE ESP25 12 Volt Battery Back-Up Sump Pump System with Audible Alarm
Hammy –
This one was my fault. I was trying to get a couple replacement batteries for my Permobil C500, and these ended up being a few millimeters taller than the battery compartment. It was a shame too because it had great connectors and arrived with everything else I needed.Mighty Max Battery was very good about the return though, and I had my refund sent immediately. I’ll be a little more careful shopping for their batteries in the future, but I know I can buy without fear from this company.
Raul’s Reviews –
I’m using this battery as an emergency back-up power for a small portable solar system, it fit in a Minnkota trolling motor box for my portable power center. I have a 2000W Pure Sine Inverter attached to it and a 100W Windynation solar panel kit with charge controller keeping it topped off. I’m very happy so far with the battery and its capacity.
ChrisTop Contributor: Camping –
I’ve been using this in my boat as an auxiliary battery to run 2 amplifiers (totaling around 1200 Watts). On long days I usually break out a 50 watt solar charger for peace of mind, but it hasn’t died on me yet. I’ve pulled it out and brought it home to charge fully, just once, in 11 trips. I don’t expect it to last through too many seasons. I expect the extremely hot storage temperatures aren’t easy on the battery, but so far so good. **EDIT 7-2-2018** After 2 years this battery is still performing well. That’s relatively impressive considering it’s been stored in a boat in Alabama for 2 summers and 2 winters. And considering it’s been discharged to 0 at least twice. Probably under 50 percent SEVERAL times. But I’ve only needed to charge it 3 times with AC. The solar power has kept it going the rest of the time with considerable use. I’m considering buying another because I expect this battery to lose its usefulness soon. it has certainly endured some torture as far as batteries are concerned.
Chris –
I’ve been using this in my boat as an auxiliary battery to run 2 amplifiers (totaling around 1200 Watts).On long days I usually break out a 50 watt solar charger for peace of mind, but it hasn’t died on me yet.I’ve pulled it out and brought it home to charge fully, just once, in 11 trips.I don’t expect it to last through too many seasons. I expect the extremely hot storage temperatures aren’t easy on the battery, but so far so good.**EDIT 7-2-2018**After 2 years this battery is still performing well. That’s relatively impressive considering it’s been stored in a boat in Alabama for 2 summers and 2 winters. And considering it’s been discharged to 0 at least twice. Probably under 50 percent SEVERAL times. But I’ve only needed to charge it 3 times with AC. The solar power has kept it going the rest of the time with considerable use. I’m considering buying another because I expect this battery to lose its usefulness soon. it has certainly endured some torture as far as batteries are concerned.
TJ –
used these batteries for my Jazzi wheelchair. Work perfectly! One charge every two weeks!! Thanks!!!
justaguy –
Hooked this up to the Wayne ESP25 backup sump pump. Installed easily. Cheaper than the Wayne battery. I hope I never need it .
DB2071 –
Works as advertised
DB2071 –
Works as advertised
William R. Youtz –
I ordered this battery for my trolling motor and it is working better than expected. Great product and fast delivery.