Customer reviews from Stanley12volt.com
Stanley - FATMAX 100-Amp 12-Volt Fully Automatic Automotive Battery Charger Maintainer BC100BF
Average customer rating
4.8
(48 Reviews)
Rating breakdown 48 reviews
5 Stars
38
4 Stars
8
3 Stars
2
2 Stars
0
1 Star
0
Customer Reviews for Stanley - FATMAX 100-Amp 12-Volt Fully Automatic Automotive Battery Charger Maintainer BC100BF
Customer Rating
5
Lightweight and compact insurance policy
on November 27, 2025
Posted by: bighousepo_1871
[This review was collected as part of a promotion.] Lightweight and compact insurance policy. Great for batteries that sit or spend time in the cold winter. Great for marine batteries and charges slow and steady to protect the battery life. I love this little trickle charger and maintainer. Highly recommend for batteries that sit for any period.
Written by a customer while visiting Stanley12volt.com
Customer Rating
4
Strong but confusing instructions
on November 24, 2025
Posted by: mohjaf_3980
[This review was collected as part of a promotion.] This seems like a highly advanced product. However, it is not often I need a maintainer and I feel would be more useful with a jumper. Regardless, it has the cables it needs which makes it super easy to use when needed. The manual is a tad confusing and if it had more clarity would be miles better!
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
It’s a must have in all cars
on November 23, 2025
Posted by: twylan_299
[This review was collected as part of a promotion.] It’s so compact and light. It’s definitely a need in all cars. It checks the engine, battery life and jumpstarts your car without the Long cables tangled up. I love it. It’s compatible and works real good.
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
Very useful
on November 23, 2025
Posted by: priyankap34_5206
[This review was collected as part of a promotion.] I received this Stanley FatMax BC100BF 1 Amp Battery charger & maintenance for lead acid & lithium batteries complementary to share my honest experience
The build quality is the first thing I noticed — it feels solid and well put together, not flimsy at all.
The cables are thick and sturdy, which gives a lot of confidence when using it.
I like that it supports both lithium and lead-acid batteries, so it works for different vehicles and tools.
The screen is clear and easy to understand, and the buttons are straightforward.
It has opposite-polarity protection, which is a big relief because I don’t have to worry about connecting something the wrong way.
I haven’t tried jump-starting my car yet, however I honestly feel it will perform really well when needed.
The charger runs quietly and doesn’t get too hot, which is a plus.
It’s surprisingly portable for its size and feels easy to carry around.
The battery life and performance have been solid so far — it charges smoothly without any issues.
Overall, it’s a dependable tool to keep in the garage, especially for emergency situations.
The cables are thick and sturdy, which gives a lot of confidence when using it.
I like that it supports both lithium and lead-acid batteries, so it works for different vehicles and tools.
The screen is clear and easy to understand, and the buttons are straightforward.
It has opposite-polarity protection, which is a big relief because I don’t have to worry about connecting something the wrong way.
I haven’t tried jump-starting my car yet, however I honestly feel it will perform really well when needed.
The charger runs quietly and doesn’t get too hot, which is a plus.
It’s surprisingly portable for its size and feels easy to carry around.
The battery life and performance have been solid so far — it charges smoothly without any issues.
Overall, it’s a dependable tool to keep in the garage, especially for emergency situations.
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
Great product works as expected
on November 18, 2025
Posted by: julianom1_6193
[This review was collected as part of a promotion.] Great product, and great value. I could use it and it worked as expected . The visual is awesome and it seems upgraded with you compare with similar products
Definitely a battery charger you must have for emergencies
Definitely a battery charger you must have for emergencies
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
Impressive
on November 18, 2025
Posted by: sala10_3121
[This review was collected as part of a promotion.] I recently used the Stanley FATMAX battery charger/jump-starter on my car, and honestly, this thing is a lifesaver! The design is compact, sturdy, and easy to handle it feels solid and dependable the moment you pick it up.What impressed me most is how fast and effortless the setup is. The clamps are strong, the cables are long enough to reach comfortably, and the digital display makes everything clear and simple. It gives you instant information on your battery level and the charging status, so there’s no guessing.
The 100A engine start power is strong enough to boost a completely drained battery, and the 25A fast-charging mode is perfect when you need a quicker recharge without waiting forever. I also appreciate that it works for both lithium and lead-acid batteries super convenient if you switch cars or help someone else.
Another thing I love is the built in safety features: reverse polarity protection, alternator check, and smart charging. It feels very beginner-friendly and safe even if you’re not a car expert.
Overall, the Stanley FATMAX is reliable, powerful, and easy to use. It’s one of those tools you don’t think you need until the day you really need it and then you’re thankful you have it. Highly recommended for anyone who drives, especially if you live somewhere hot, cold, or you’ve ever dealt with sudden battery issues.
The 100A engine start power is strong enough to boost a completely drained battery, and the 25A fast-charging mode is perfect when you need a quicker recharge without waiting forever. I also appreciate that it works for both lithium and lead-acid batteries super convenient if you switch cars or help someone else.
Another thing I love is the built in safety features: reverse polarity protection, alternator check, and smart charging. It feels very beginner-friendly and safe even if you’re not a car expert.
Overall, the Stanley FATMAX is reliable, powerful, and easy to use. It’s one of those tools you don’t think you need until the day you really need it and then you’re thankful you have it. Highly recommended for anyone who drives, especially if you live somewhere hot, cold, or you’ve ever dealt with sudden battery issues.
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
a great thing to have
on November 7, 2025
Posted by: briannam330_2415
[This review was collected as part of a promotion.] this is so convenient to have! you never know when you’ll need to jump start something. it seems to work extremely well while also being very high quality. i would recommend this for everyone to keep handy.
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
Powerful, Safe, and Efficient Charger for All Batt
on November 6, 2025
Posted by: bellak58_5132
[This review was collected as part of a promotion.] The Stanley FatMax BC100BF is an excellent battery charger and maintainer. It’s very easy to use and works great for keeping both 6V and 12V batteries fully charged. I like that it’s compatible with multiple types of batteries, including AGM, GEL, and lithium, which makes it super versatile.
It charges efficiently and safely, and the automatic shut-off feature gives peace of mind knowing it won’t overcharge. The display is clear and simple to read, and the overall design feels sturdy and durable. Perfect for maintaining car, motorcycle, or lawn equipment batteries definitely a reliable tool to have on hand. Highly recommend!
Written by a customer while visiting Stanley12volt.com