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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
4.4 out of 5 stars
stars283 ratings194 reviews
  1. 5 stars74% (210)
  2. 4 stars12% (35)
  3. 3 stars2% (7)
  4. 2 stars3% (9)
  5. 1 star8% (22)

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Showing 1-10 of 194 reviews
Jan 12, 2026
Ashley
5 out of 5 stars review

Verified Purchase

All in one

I started traveling and driving out of town now. Love having this in my car and know I can jump start my car or air up a low tire without anything or anyone else. Thankfully, haven't needed it for that yet. We did air up a bike tire, and it worked well and fast. The light is super bright as well!

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Nov 9, 2025
Tammy
5 out of 5 stars review

Verified Purchase

Stanley Fat Max

My absolute all time favorite Product !! I have bought 10 Stanley Fat Maxes. Every family member has received one For birthday or Christmas!!! jumped started 15-25 cars with it pumped up 20-30 tires! checked 8 Alternators! Used 20+ tires for power outages Used 5 times for road side Emergencies With the Flashing Light!

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Oct 30, 2025
Nugget
5 out of 5 stars review

Verified Purchase

Better than jumper cables.

Excellent device to use to jump start a weak battery engine or pump up low tires. With newer cars it can be risky to use standard jumper cables when your car has so many digital chips that can be damaged if something goes wrong.

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Dec 18, 2025
CJ
5 out of 5 stars review

Verified Purchase

Great product

I bought two of them because I was satisfied with the functionality and so far they have worked well.

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Sep 3, 2025
Lauren
5 out of 5 stars review

Verified Purchase

Handy device on the road

Have already used it 3 times and works great and keeps a charge for a long time! Would recommend to anyone and will buy again when I need to a new one

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Nov 3, 2025
Mike H
2 out of 5 stars review

Verified Purchase

Older model was a much better design

This newer model operating position is flat. The air hose is shorter so if your valve stem is at the top you have to hold it up to get your tire aired up. It doesn't fit down in my side box like the older model I have. The light is built into the lid of the air hose cover so you can't aim it as well. It comes with a charge adapter that you have to keep somewhere. There's nowhere on the unit to store it. If you lose the cable you can't charge it and it's junk. On the older model you could plug an extension cord right into the back and charge it.

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reply from Stanley 12 Volt

If further assistance is needed, please contact Baccus Global Technical Support at 877.571.2391 or email at CustomerService@Baccusllc.com

Feb 3, 2026
Del
2 out of 5 stars review

Not worth the money!

I've had this about 2 years now, and I have loved it until now, battery shows full charge, I go to pump up a tire and after 5 seconds battery is dead. Surprised, I plug it in and charge it. 45 minutes later it's charged, I hook it back up and runs 10 seconds, dead again. I test the battery and it shows 12.6V, so I guess something went wrong with the circuit board, I don't know. I searched for the circuit board and found it for about $45.00. The whole thing cost me $89.00. It should last longer than it did, I don't think it's a good value.

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reply from Stanley 12 Volt

Please charge your unit for the next 24 hours. It is recommended to charge this unit every 30-90 days to prevent the unit from discharging. If stored in a discharged state, this will reduce the life expectancy of the internal battery or can cause the battery to retain a surface voltage (which can cause the unit to read a false full charge). If further assistance is needed, please contact Baccus Global Technical Support at 877.571.2391 or email at CustomerService@Baccusllc.com

Jan 27, 2026
Ron
1 out of 5 stars review

Total crap

No power every time I needed it was dead took one back ,second one no better most likely out of warranty by now,don’t wast your money just as week as the Duracell battery I got for my tractor

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reply from Stanley 12 Volt

To best assist you in troubleshooting your product. Please contact Baccus Global Technical Support at 877.571.2391 or email at CustomerService@Baccusllc.com

Oct 1, 2025
BuzzDog
1 out of 5 stars review

Verified Purchase

A Very Disappointing Inflator

When I used this, fully charged, as an inflator to air up tires on my utility trailer, it took forever and the battery was showing on the gauge as nearly half charged after just a few minutes. I then tried it on my riding lawnmower’s tires, and again, it was slow; I managed to air up the tire on the other side as quickly using an old-fashioned bicycle pump. A shame, because if it worked well it would have been handy to have in my garage, plugged in and ready to go whenever needed.

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reply from Stanley 12 Volt

If further assistance is needed, please contact Baccus Global Technical Support at 877.571.2391 or email at CustomerService@Baccusllc.com

Mar 28, 2026
Ditto
1 out of 5 stars review

Verified Purchase

Disappointing

Purchased this which I thought was new, but was actually a return to Sam's Club (seal was carefully broken and some Christmas paper on the package). Would not hold a charge, which is why it was returned the first time. Returned.

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reply from Stanley 12 Volt

Please contact the store of purchase for assistance in getting a replacement unit. If further assistance is needed, please contact Baccus Global Technical Support at 877.571.2391 or email at CustomerService@Baccusllc.com