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🔋 Stay charged, stay unstoppable — power your life with Mighty Max!
The Mighty Max ML7-12 is a 12V 7.2Ah sealed lead acid rechargeable battery featuring F1 spade terminals for easy installation. Compact and maintenance-free, it delivers reliable power with shock and vibration resistance, making it ideal for backup systems like ONTs and power tools. Designed to perform in extreme temperatures, this battery ensures uninterrupted operation and peace of mind during outages.





| ASIN | B00K8V30D0 |
| Amperage | 7.2 Amps |
| Antenna Location | Power Tool |
| Battery Capacity | 72 |
| Battery Cell Composition | Sealed Lead Acid |
| Battery Cell Type | Sealed Lead Acid |
| Battery Weight | 5 Pounds |
| Best Sellers Rank | #8,047 in Health & Household ( See Top 100 in Health & Household ) #6 in 12V Batteries |
| Brand | Mighty Max Battery |
| Built-In Media | Battery |
| Compatible Phone Models | No Phone Models |
| Customer Reviews | 4.5 out of 5 stars 13,811 Reviews |
| Item Dimensions | 6.25 x 2.75 x 4.25 inches |
| Item Type Name | SLA Battery |
| Item Weight | 4.5 Pounds |
| Manufacturer | Mighty Max Battery |
| Model Name | ML7-12 |
| Model Number | ML7-12 |
| Number of Batteries | 1 12V batteries required. |
| Recommended Uses For Product | Power Tool |
| Reusability | Rechargeable |
| UPC | 860000524902 082045914993 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Warranty Description | Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service. |
M**B
Perfect Replacement Battery for My ONT
I purchased this battery to replace the backup battery in my home’s ONT, which keeps my fiber internet and phone service running during power outages. My original battery had begun triggering low battery alerts and was no longer holding a proper charge, so I needed a compatible 12V 7Ah sealed lead acid replacement with F1 terminals. This unit is a 12V 7Ah SLA battery with F1 spade terminals, and the dimensions matched my original battery exactly. The terminal size and placement were identical, which made it a true drop in replacement for my ONT. If your existing battery is labeled 12V 7Ah with F1 connectors, this should be fully compatible, but I recommend checking the label on your current battery to confirm before ordering. Removing the old battery was very simple. I opened the ONT battery compartment, disconnected the red and black F1 spade connectors, and lifted the old battery out. Installing this one took just a few minutes. The connectors slid onto the terminals securely, and the battery fit neatly into the compartment without any forcing or adjustment. As soon as I connected it, the ONT recognized the new battery and the low battery warning stopped immediately. The system has been operating normally since installation. While I have not yet had a long power outage to fully test runtime, the battery is charging properly and everything appears stable. For anyone needing a standard 12V 7Ah replacement with F1 terminals for an ONT backup system, this has been a reliable and cost effective solution in my experience. Excellent value for the money.
B**L
Great battery
I use these on motorized bicycles,to power head lights,turn signals, etc, these bikes have no charging system, so i have to charge the battery myself, and it's amazing how long this will go without a charge,approximately 2 months, at 30 miles per day,running the lights at all times,great batteries!
S**N
Dependable and Compact 12V Backup Power
This battery is a strong choice for providing reliable power in emergency lighting, alarm systems, or UPS units. I recently used it to replace an aging battery in my backup power setup, and it performed smoothly from day one. The battery is fully sealed, with no leaks or maintenance needed—just set it and forget it. At 7.2 Ah, it’s small enough to fit into tight spaces, but still offers hours of backup time for low-power devices. The terminals are sturdy and accept standard connectors easily, making installation quick and simple. One thing to note: like all lead-acid batteries, it works best when stored in a cool, dry place and charged periodically to maintain peak performance. Also, it’s heavier than lithium options, so expect a bit of heft when handling. Overall, the Mighty Max ML7-12 SLA Battery is a well-built, easy-to-install, and reliable power source. It’s a smart option for anyone needing standby or backup power without fuss or frequent upkeep.
E**.
Worked
worked, a little high priced
A**R
Good to go!
This battery was for my alarm system backup power. It was even cheaper than some of the local stores in my area and delivered fast and I'm in Hawaii! Easy install. Up and running in 10 minutes.
R**W
Good battery for multiple purposes serves my needs
I bought this battery to power my fish finder for my boat when I'm programming it off the boat it provides the power I need I just had to buy an adapter cord here on Amazon to fit my fish finder and it works perfect turns out I have a second use for it runs a little booster pump when I fertigate in my garden I just had to make an adapter for it to plug in onto the battery fortunately the battery has standard blade quick connects so I just soldered connectors onto a set of wires that plug into the booster pump and it's nice small lightweight so it's easy to transport to my garden in a bucket with the little pump so it serves me dual purpose it also charges very quickly with a standard Automotive 12 volt charger and it's a sealed battery so you don't have to worry about acid getting all over like a traditional battery
H**T
Good
Go quality and long lasting
M**M
I thought these were great until...
I bought one of these Mighty Max Batteries (12V 7.2AH) as a replacement to power my ONT. It worked for a three hour period of time and since my ONT has stopped recharging the rechargeable batteries, I needed additional batteries to rotate in for a full day's use since my internet doesn't work without the battery that doesn't have anything to do with the internet in the ONT. I purchased two additional Mighty Max batteries. I decided to buy one more to be sure I always have one charged and ready to swap in but these weren't available so I purchased the recommended alternate Amazon suggested. That battery has nearly exactly the same specs (12V 7.0AH) and oh my goodness... it lasts for SEVEN HOURS! Same ONT, same charging cables used. So much money and time wasted on these Mighty Max batteries.
M**O
Buena calidad y precio
Muy buena pila le funcionó muy bien al carro eléctrico de mi hijo
J**O
Good battery
Very good quality battery. It works well increased speed.
A**1
Recomendado.
Ayudo a revivir mi UPS, recomendado.
M**C
As described , good product
Works great , fits well
B**H
Backed Their Product
I purchased 4 of these for my 2 APC UPS’s in August of 2024. I had to ship 2 back for exchange as they would not charge. Replacements arrived quickly from seller. However in the end after mix and match out of the 4 two were good and 2 seemed marginal, but I kept them because of return inconvenience. The 2 good ones are still giving me a run time of 150 minutes for my router, ISP equipment, and security cameras. Verified by recent extended power outage and UPS feature. They are great. The marginal ones now after 10 months have no reserve capacity, and never were very good, even though showing full charge. They actually fully failed a couple months ago but only now am I trying to have replacement covered by 1 year warranty. With previous batteries, before failing, the attached equipment had 15 minutes of run time when on and 45 minutes when in standby. I should have returned the marginal ones…..along with the others. I have since contacted the vendor using the supplied Amazon support link to replace the two batteries still within the 1 year warranty period. I was discouraged after not receiving a reply in a reasonable amount of time, but when I checked my junk, sure enough there was a reply that arrived within 2 days. I replied and showed proof of failure. The good news is that replacements have now arrived. Batteries can be difficult, but Mighty Max made things right.
Trustpilot
1 week ago
3 weeks ago