NOCOBoost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 6.0L Gas and 3.0L Diesel Engines

This is the first jump starter I ever owned and it has saved me from having to deal with headaches every time I have used it. I was having intermittent alternator issues on a V6 dodge and my battery die every now and then. This started it up right away on the boost mode and even gave the battery enough charge for me to get where I needed to go (short distances). The charging speed could be better but that's really a non issue. The design is compact and feels well made. Highly recommend

I’m out of town for months at a time. Therefore, every time I return home, my battery’s dead. I was concerned this would not be strong enough to start a hybrid, but it works like a charm. The unit is small and easy to use.The one thing I will advise: on a hybrid the battery is often too dead for this unit to recognize it’s connected. You have to override the sensor for it to actually jump your car.

I’m very impressed with the NOCO Boost Plus! Sometimes my truck doesn’t start, so I ordered this product. I used it, and it works great—it charges the battery in only about 5 minutes if the battery isn’t completely dead. If the battery is totally dead, it takes a bit longer, but it still works perfectly. A very good purchase.

I've been using the NOCO Boost Plus GB40 for a while now, and it has proven to be an invaluable tool for my car. Here are a few reasons why I highly recommend it:Compact and Portable: The GB40 is incredibly compact and lightweight, making it easy to store in your glove box or trunk. Despite its small size, it packs a powerful punch.Powerful Performance: With 1,000 amps of peak current, this jump starter can easily jump-start most vehicles, including cars, trucks, and even motorcycles. It can perform up to 20 jump starts on a single charge 1.Safety Features: The GB40 includes advanced safety features such as spark-proof technology and reverse polarity protection, ensuring safe and foolproof operation 2.Multi-Functional: Beyond jump-starting, the GB40 also functions as a portable power bank. It has a USB port for charging your devices and an integrated LED flashlight with multiple modes, including SOS 2.Durable and Reliable: Built to withstand harsh conditions, the GB40 operates effectively in extreme temperatures, from -20°F to 140°F 2. Its rugged design ensures it can handle repeated use.Overall, the NOCO Boost Plus GB40 has exceeded my expectations. It's a reliable, versatile, and powerful tool that provides peace of mind, especially during road trips or emergencies. Highly recommended!

Why did you pick this product vs others?:This is an amazing battery jump pack!!! I loved my first one so much I bought a second one for my other car. I gave it 4-stars because in the second packaging, completely sealed, it was missing the extension cord to charge it in a cigarette lighter port. Other than that, it’s been good to me.

The NOCO Boost Plus GB40 is one of the best purchases I have ever made. Now, three more members of my family have one. I purchased one for my motorcycle since sometimes I don’t ride for a while due to travel or weather. This gives me peace of mind knowing I can start the motorcycle no matter what. I once had to use it when commuting from work because I didn’t notice I had left the flashlights on all day. Eventually, I ended up getting a GENIUS5, also from NOCO, to keep my battery charged. Since then, I haven’t used the GB40, but I still keep it in my pannier, charged just in case.I was so happy with the GB40 that I recommended it to a family member. They got it and, fortunately, didn’t need to use it. Then, on a recent trip to visit them, one of their cars had been parked for a couple of days with some lights turned on. The battery was completely dead, showing less than a Volt on a multimeter. Of course, the NOCO starter didn’t recognize the battery as it was too low. We used the boost mode and were able to start the car with no issues. My family was so happy with the result that they bought two more to have one in each car.What I like:It has safety checks to prevent sparks, shorts, and reverse polarity (this also detects the voltage on the battery, which means if the battery has very low charge, it will fail to start in the normal mode).The boost mode disables all safety checks and works similarly to using cables from one car to another. This is a bit risky and you don’t want to use it often, but when you need it, it’s a relief to have.The cables are short and seem of good quality. The crocodile clamps have a firm grip without damaging battery connectors.It’s not bulky; I keep mine in one of the motorcycle panniers and it doesn’t take up much space. I probably should have bought the GB20, which also has the boost mode but is cheaper, and for a motorcycle would be more than enough. However, I vaguely remember it was not available when I got mine. I don’t regret it, though, as the GB40 can start a motorcycle (even a car) several times before needing to be charged again.You can use it as a lamp or emergency light, and also as a power bank for your phone or any other small device.What I don’t like:Storing it in the provided bag works but feels a bit messy. Other models, such as the GB70, can accommodate the clamps on the starter, which seems much cleaner. There is a case you can buy, but that will consume space, which, in my case using a motorcycle, is not much of an option.The boost mode is not really a boost, just a safety-disabled mode. I don’t like when companies use misleading names just to have a selling point.About the specs:I have no way to verify the claimed specs in the description, such as the 1000 Amps of discharge, but from a user’s perspective, it works with cars and motorcycles with no issues, even with flat dead batteries.In conclusion, I think this is a must-have. Hopefully, you don’t need to use it, but like insurance, you’ll be really happy to have it if you ever find yourself in a situation where you need it.

I received the NOCO Boost GB40 yesterday and had the chance to use it immediately on my niece's Nissan Xterra, which hadn’t been started in over a year. The battery was almost completely dead—just 0.79 volts. I didn’t have high hopes, but the GB40 surprised me. I used the override function, and on the very first attempt, the engine started up without any hesitation.The unit feels solid and well-built, and it’s compact enough to store easily. I’m genuinely impressed by the power this little device packs. It worked exactly as advertised and saved me from what could have been a much more complicated situation.Highly recommended for anyone looking for a reliable jump starter!