Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 6.5L Gas and 4.0L Diesel Engines

The 1250A UltraSafe Jump Starter is a compact and reliable lifesaver for every driver. With 1250 amps of starting power, it easily jumps most cars, trucks, SUVs, and even some boats without needing another vehicle. Its portable size makes it easy to store in the glove box or trunk, and built‑in safety features give peace of mind — no sparks, reverse polarity protection, and overload protection make it user‑friendly even for first‑time users. The included USB ports and LED flashlight are great extras when you’re on the road, and the battery holds a charge well over time. Setup is simple — just connect the clamps, and you’re ready to go. Pros: Compact, powerful jump starting, safety‑focused, USB charging & flashlight Cons: Best suited for occasional use vs. heavy frequent use Bottom Line: A reliable, easy‑to‑use jump starter that gives confidence on the road — perfect for emergencies and everyday preparedness.

I own a NOCO GB40 that has lasted many years 7 I believe. It is time to retire it finally. I use it for work at a small dealership and it never fails. One thing I will note from another review is that it WILL activate if the vehicle battery is totally dead. You have to hit the Boost / Override button. There are no real instructions with this unit, just a warning book in several languages. You can find user instructions under support on Noco's website. Just select support / boost jumpstarters, then your model. The unit is pretty self explanatory except the "boost" function. I expect to get many years out of this GBX45, and it has a few extra features. USB-C charging In-Out is a plus, as are the extra light modes. That being said the GB40 has started everything that I tried it on. I use this probably more that most customers will. I did have to replace the jump leads on the GB40, but this was after over 5 years use and rough handling at times. When not being used for work, it resides in my trunk. I have never needed it for my personal car, but I have helped several others over the years. There are several other devices on Amazon that are less expensive with more power supposedly, but why chance it when I know this one should last many years like my last one did. I also buy from trusted brands only when it comes to rechargeable lithium batteries of this size. It is not worth a fire risk to save a few dollars! Cheaply assembled Lithium batteries are noted for overheating while being charged. At work we have had two that swelled to the point of being unsafe to charge. Not the NOCO.

Purchased this as we have many things that may require a jump start. It charges quickly and is very easy to hook up and jump start anything we need it for. It is a nice, compact size and comes with a carrying case. It works great and we would highly recommend it.

I bought the GBX45 for my Harley Iron 883 and it works like a charm. It got my bike started in no time. The best part is how fast the unit itself recharges: it took exactly 1 hour to go from empty to 100%. Highly recommended for any rider!

This product worked great. I live in the northeast and have an old car that has been sitting for about 6 months. The last month was under a mountain of snow. My Noco arrived today charged it up for about a hour. Put it on the battery and the car started on the first try. The battery was completely dead. I even tried it on a trickle charger a few months ago and it faulted saying the battery wasnt holding a charge. The only downside I saw was a lack of instructions. I had to google around to find how to use it. The charging lights werent that intuitive. There is an override button that you have to press if the battery you are jumping is below 3 volts or so which mine was as it was completely dead. That kept me from giving it 5 stars. Otherwise, it worked great.

I recently purchased the NOCO Boost X GBX45 jump starter, and I couldn't be more satisfied! This ultra-safe jump starter is a game changer, combining power and portability in a compact design that is perfect for anyone who needs a reliable battery booster on the go. With 1250A of peak current, the GBX45 can jump-start a wide range of vehicles, including cars, trucks, and even motorcycles. I was impressed with how quickly and easily it started my vehicle after leaving the lights on overnight. The clamps are well-designed, making them easy to attach and ensuring a solid connection. One of the standout features is the UltraSafe technology, which includes reverse polarity protection, short-circuit protection, and spark-proof technology. This gives me peace of mind knowing that I can safely use it without worrying about making a mistake. The design of the GBX45 is sleek and portable, easily fitting into my glove compartment or backpack. It also features a built-in USB port that allows me to charge devices like my phone or tablet, which is a fantastic bonus for road trips! The LED flashlight with multiple modes is incredibly handy, especially in emergencies or during nighttime situations. The charger itself holds a charge for a long time, ensuring it’s ready to go when I need it. Overall, I highly recommend the NOCO Boost X GBX45 for anyone looking for a powerful and safe jump starter. It's a reliable tool that combines performance and convenience, making it an essential addition to any vehicle's emergency kit!

This thing works great! I was able to jump start a 20 year old V8 AMG engine with a completely dead battery. Very light weight and well built. Quality product.

This is a really great product. It replaces my ungainly set of jumper cables and fits in the glovebox. It is easy to use, convenient to charge, and ready in an emergency. Since it is battery powered, I take it out once in a while to make sure it is fully charged. It can even be charged using the vehicles charging ports. I recommend this product.