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Customer reviews for STANLEY FATMAX 1200 Amp Jump Starter + 120 PSI Air Compressor & USB Power for
STANLEY FATMAX 1200 Amp Jump Starter + 120 PSI Air Compressor & USB Power
4.3 out of 5 stars
stars
321 ratings212 reviews
  1. 5 stars71% (228)
  2. 4 stars12% (38)
  3. 3 stars3% (11)
  4. 2 stars4% (12)
  5. 1 star10% (32)

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Showing 41-50 of 212 reviews
Nov 30, 2025
Reviewer name: Marien
5 out of 5 stars
5 out of 5 stars review

Long lasting and very satisfied

I purchased a unit just like this new one I just purchased again. The original one lasted me 5+ years. I used it mantvtimes to jump start my 24hp lawn mower, my 15vyear old cars when needed, and inflated many PU truck, car, lawnmower, and bike tires. The auto shut-off works great and the large battery allows you to check n fill all 4 car tires in one charge.

Review from Stanley12volt.com
Helpful?2Y4T43AGN1F815188023565
Sep 25, 2025
Reviewer name: arisha1_6794
5 out of 5 stars
5 out of 5 stars review

My new favorite jump starter

[This review was collected as part of a promotion.] I recently got the Stanley jump starter, and it’s been a lifesaver! When my car wouldn’t start, I just connected the clamps, and it worked like a charm. The reverse polarity alarm is a smart feature, and the air compressor is super handy for tires. Plus, the USB ports let me charge my phone. All I have to do is charge every month! Overall, I’m really glad I have it for peace of mind on the road.

Review from Stanley12volt.com
Helpful?2Y4T43AGN1F815188023565
Dec 28, 2025
Reviewer name: Kathryn
3 out of 5 stars
3 out of 5 stars review

Sad and disappointing

Thought this would be a great gift for my son but turns out it won't hold a charge and took over 30 mins to barely inflate a 40psi tire, which in turn drained the battery. This was highly disappointing considering the price. Will stick with the better yellow and black name brand for better quality

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Nov 30, 2025
Reviewer name: anonymous
2 out of 5 stars
2 out of 5 stars review

pointless

Does what it says... IF IT HELD A CHARGE. This would be okay if you can keep it plugged in at home every day/every other day). Mine needed to go with me in the car, but any time I needed it there wasn't enough power to jump my car, %26 would die while trying to jump if not already dead). It needs 110% charge to jump a vehicle, which it never had bc the second I unplugged the dc cord and put in car it started losing charge, was dead within 1 day from the get go. Just tonight my neighbor came to jump my car, pulled out his jump start, and his was dead as well... it's been hours %26 it still isn't charged enough to jump, and his is the least powerful model. It needs to be able to jump while plugged in, to charge from the car, or something to be more practical/useful

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reply from Stanley 12 Volt

Please charge your unit for the next 48 hours to ensure the battery is fully charged. To best assist you in troubleshooting your product or for warranty assistance. Please contact Baccus Global Technical Support at 877.571.2391 or email at CustomerService@Baccusllc.com

Jan 17, 2026
Reviewer name: LINDA
5 out of 5 stars
5 out of 5 stars review

Awesome

Best thing works perfect It has so many functions and it's so very useful. I was fortunate enough to get it when it was on sale for around $56 and I bought two of them. I wish I had bought more and make great gifts for loved ones you can charge your phone , you can jump your car off you can put air in your tires, etc. there's just so many things that this machine can do.

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Sep 3, 2026
Reviewer name: David
1 out of 5 stars
1 out of 5 stars review

Instruction manual small print creates complacency

I will be returning it because the instruction manual print is to small to read.

Review from Stanley12volt.com
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Dec 24, 2025
Reviewer name: Kathy
1 out of 5 stars
1 out of 5 stars review

Verified Purchase

Christmas gift

Dont know, its a Christmas gift for our son

Helpful?2Y4T43AGN1F815188023565
reply from Stanley 12 Volt

We don't know why you gave this a one star review. If further assistance is needed, please contact Baccus Global Technical Support at 877.571.2391 or email at CustomerService@Baccusllc.com

Jan 13, 2026
Reviewer name: Victor McElwain
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Best thing for a car just in case

I had a similar unit, this one is just as good, it will jump anything.

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Dec 6, 2025
Reviewer name: Anita
4 out of 5 stars
4 out of 5 stars review

Verified Purchase

Jump starter

So far, I haven't had to use it which is a good thing

Helpful?2Y4T43AGN1F815188023565
Jan 19, 2026
Reviewer name: Raymond
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Much improved design!

Very impressed with the improvements in design of this new model.

Helpful?2Y4T43AGN1F815188023565