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Mighty Max Battery ML7-12 - 12V 7.2 AH Rechargeable SLA Battery

Curated from 36 real Reddit conversations

Refreshed on: March 13, 2025

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Mighty Max Battery ML7-12 - 12V 7.2 AH Rechargeable SLA Battery

Brand: Mighty Max Battery
Price: $19
Snoop Score:
7.9
Sentiment
8.3
Popularity
9.3
Technical
7.4
Buy on Amazon for $19See All 12V Reviews
As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

Mighty Max Battery’s ML7-12 is a 12V 7.2 AH sealed lead acid rechargeable battery engineered to deliver consistent power for a variety of applications. Compact and UL-certified, it is designed to handle high discharge rates and deliver reliable performance in both high and low temperatures. Community chatter is a mix of assured reliability and cautious skepticism. One user remarked, 'I have used them in my UPSs for years. They work.' This sentiment is backed by others who appreciate its role as a viable replacement option, although some doubt the overall quality. The discussions mirror a typical Reddit debate, where enthusiasm meets a hint of doubt. Overall, the product is recommended for those seeking a dependable and versatile battery for everyday devices, as long as you’re comfortable with the occasional skeptical remark from the community.

Not for you? Check out our other rated 12V

From what I’ve heard 5 years is pretty good for batteries like that, I’ll probably go ahead and buy the mighty max batteries.

Positive Feedback

I haven't used MightyMax but I'm a bit skeptical of their quality.

Negative Feedback
Product
7.9
Mighty Max Battery ML7-12 - 12V 7.2 AH Rechargeable SLA Battery
Buy on Amazon for $19
Home Security Devices
7 / 10
LED Lighting Systems
5 / 10
Automotive Accessories
8 / 10
Emergency Backup
8 / 10
See how this compares to all 12V

What it does well!

Key strengths users can’t stop talking about.
Reliable performance in UPS applications
“From what I’ve heard 5 years is pretty good for batteries like that, I’ll probably go ahead and buy the mighty max batteries.”➕
“Yuppers. Have used MM batteries quite a bit in things.”➕
“I have used them in my UPSs for years. They work.”➕
Viable replacement battery option
“I found these alternatives from Mighty Max for $179 and $199.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Skepticism about product quality
“I haven't used MightyMax but I'm a bit skeptical of their quality.”➕

Compare On All Talked About Dimensions

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Core Power Plays

The specs and strengths that make it shine.
Technical discussion on battery current draw
“I have a mighty max battery that I run led lights off of.”➕
“The current draw is based on what the LED lights require up to the maximum the battery can provide.”➕
Charging time discussion for 12V batteries
“Leave it overnight. 2A isn't a lot.”➕
“I didn't trust it to leave it charging while I was at work.”➕
“If it was left to sit until it self discharged to dead, the battery is probably dead and will never charge.”➕
“If it's supplying a proper and steady 2a, it should take 5 hours from dead since it's a 10ah battery.”➕
Specialized battery terminal connection requires proper cables
“I bought an F2 type battery connector on Amazon but it was too small to slide onto the + & - terminals of the battery.”➕
“You can't find anything because this type of battery is meant to have power cables with a crimp on eyelet at the end.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Considerations for powering Arduino projects with a 12V battery
“Some fellow researchers have recommended using a MightMax battery to do this and being a beginner to Arduino/batteries I am wondering if this is possible and would work fine?”➕
“A better alternative is a buck converter powering the 5V pin (or USB jack).”➕
“I'd be running it likely for 12 hours not 24 so it would last closer to 2 weeks.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
UPS battery replacement technical advice
“Yes, just put the exact same size lead acid back in it.”➕
“Yes I only have it to keep it on until I can shut it down after a power outage.”➕
“You don't have to get the exact same battery, just one with the same voltage (12V), dimensions and the same capacity (7.2AH) or higher.”➕
“CSB batteries are a good replacement if you want it to last as long as possible.”➕
Voltage compatibility concerns for 12V ride-on applications
“Staying 12v will be the simplest way to swap batteries and not worry about anything else.”➕
“Thanks, that is useful!”➕
“When you go higher than 12V it will increase the stress on the motors and you will end up replacing the motors sooner rather than later or never.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
Clarification on electrical safety advice
“YSK that "it's not the volts that kill, it's the amps" is oversimplified and should not be taken as safety advice.”➕
Discussion of rapid battery drain in automotive usage
“I'm just so fricking tired of having a dead battery every weekend on a brand new car.”➕
“have them do a parasitic draw test to make sure it’s not drawing excessive current and killing the battery”➕
“The battery’s draining itself and needs to be replaced.”➕
“It's a known issue and it's 100% a bad battery.”➕

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