Rated 4.80 out of 5 based on 5 customer ratings
(5 customer reviews)

$39.99

ML18-12 – 12V 18AH UPS Replacement Battery compatible with Sigmas SP12-18HR, SP 12-18HR

SKU: ML18-1221112 Category:
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$39.99
$79.99
$159.99
Delivering power when you need it, the Mighty Max ML18-12 12 Volt 18 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 ML18-12 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: 18 AH
Chemistry: SLA, AGM
Terminal: Nut and Bolt (NB)
Battery Dimensions:
7.12 in x 3.00 in x 6.50 in
Weight: 11.90 Lbs
Warranty
1 Year
Multi Packs Bundled Savings

1 Pack, 2 Pack, 4 Pack

Volts

12V

Amp Hour

18Ah

Chemistry

SLA / AGM

Terminal

Nut and Bolt

Quantity

1

Length

7.12

Width

3.00

Height

6.50

Weight

11.90 Lbs

Warranty

1 Year

5 reviews for ML18-12 – 12V 18AH UPS Replacement Battery compatible with Sigmas SP12-18HR, SP 12-18HR

  1. Rated 5 out of 5

    Nuker27

    Worked great to replace the batteries in my APC SmartUPS 2200.

  2. Rated 5 out of 5

    Joe D

    I used this for my kids power wheels. It last a long time in comparison to the battery it came with stock. Kids can now ride it for many hours. Just had to cut off the factory plug on the car so it can be connected to this battery.

  3. Rated 5 out of 5

    Dayna Bertaut

    can last the whole day

  4. Rated 4 out of 5

    Christopher D’Amico

    Fully charged when received. Measurements are accurate for overall size and for terminals. Have not installed (seasonal outdoor equipment – chipper shredder vac electric start) so cannot comment on holding charge and recharging and starting capabilities, but do not expect any problem with sealed lead acid battery. Hope to have 7 years of good use out of it. I do store it indoors between seasons.

  5. Rated 5 out of 5

    Darwin Maring

    You will get a charge out of this

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Excellent
Mighty Max Battery
Based on 4608 reviews
Delivered on time and expected!
Great Battery for the Ion Block Rocker Bluetooth speaker to make it mobile
This is the second pair of batteries that I am using in my Champion 8500 home generator. Manufacturer says replace batteries every two years in Floridas hot summer seasons. Had the first pair of these batteries installed over three tears and still start the 24v generator every time. Installed new ones because hurricane season 2026 started, and I don’t want to install the new ones during a hurricane. Best batteries I have ever had. First set from another company barely made it two years. Go Mighty Max!
Arrived on time. And was exactly what it was described. Exact match
I am really pleased with the performance of the MIGHTY MAX BATTERIES I purchase to replace the ones that came on my RYOBI Zero Turn Mower.
From Amazon.ca arrived on time
It arrived quickly and was ready to use.
I had to replace the battery in my back up generator. Purchased the Mighty Max on Sunday. Delivered on Monday. Installation in the generator was a breeze due to the perfect size and correct terminals. I’m confident this battery will last for years to come and will make powering my home easy when power goes out.
Great price, arrived as promptly and made in the USA.
The battery arrived in a timely manner.