NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 10.0L Gas and 8.0L Diesel Engines

So, you're looking at this because you have a 1-ton truck? Dual batteries? And I'm guessing in the cold your engine simply just doesn't want to start, right? Or perhaps you've got a vehicle that loses battery charge after a couple days of being unused? Or perhaps you have a habit of accidentally leaving the dome light on all night? Or perhaps your battery just isn't up to snuff anymore and you just want to make sure it starts, regardless? And now you're looking at that price of $370 (at the time of this review) and thinking to yourself "There's got to be a cheaper one that will get the job done, right?" Short answer? Possibly. Shorter answer? DON'T! <] TLDR [> It absolutely works. It delivers the power it advertises. It's worth the money. If you want a boost pack that just works and you can afford it? Then just buy this one! You will NOT be disappointed! DO NOT buy the cheaper "Gibberish Brand" packs. If you do, you WILL be disappointed and they WILL leave you stranded. Yep. it really is that simple! My ONLY regret in buying this jump pack is that I didn't buy it sooner! I just couldn't justify the price tag... If I had known just how good it is, I'd have made room in the budget for it a lot sooner than I did! <] /TLDR [> I have a 1998 GMC K3500 with a dual battery setup. I do NOT have a block heater (yet). At zero degrees (F), it turns over but REFUSES to catch. After turning the engine over for roughly 10 seconds on a fresh full charge, it just quits. No go juice! And if you've done like I have by adding a manual override for your glow plugs because you upgraded them and know they can handle the extended burn time? It's still not enough. The batteries are just too small to be viable in the winter on the Canadian border where I am. Now that you have the backstory, I too was put off by the price. I watched a LOT of videos comparing various jump packs and every single one of them rated THIS pack, the NOCO Boost X GBX155 as the highest in every single list. I really had a tough time shelling out the cash for this, but now that I have it? I'll NEVER give it up! This thing is super easy to use. Charge it up when you get it. Believe it or not, for as heavy and bulky as this jump pack is, it charges FAST. From depleted to full charge in under 3 hours! That's AMAZING! If you have a dual battery diesel truck like me? You're going to be absolutely ASTONISHED at just how much power this thing packs. Its punch is nothing short of INCREDIBLE! When you hook it up to your battery, make sure you connect it to the battery that has the positive lead straight to the starter. While it'll work, connecting it to the accessory battery WILL cause a loss of power to the starter simply because of the cable run length from the accessory battery over to the primary start battery and then to the starter. Really, the only thing I can say I'm not too fond of is where they put the button to turn on the flashlight function. That darned thing is RIGHT where I grab it to pick it up and every time I pick it up I inadvertently press the flashlight button and let me tell you, it's pretty darned bright! This thing will also let you override the error condition on a FULLY depleted battery to allow you to jump the vehicle regardless of your battery voltage. Another really nice feature is the fact that it also has two USB-A ports to charge another device with, like your phone. The USB-C charging port can also be used to charge another USB-C device, too! The charging port goes two ways! The real reason you're looking at this specific jump pack though, is to find out if it lives up to its promises. I can tell you that yes, it absolutely does! Keep this in your vehicle and you'll end up being a hero to someone if they need a jump, too. No more need to carry long, heavy jumper cables if you've got this thing! You can rest easy if you have this jump pack. If you get into a spot of trouble because you left your headlights or marker lights or dome light on and ran your battery down while you were at the theater watching a movie or something? This will absolutely get you out of a jam. My truck is nearly 30 years old. I upgraded the starter to a planetary reduction gear starter. In the summer months, the dual batteries spin the engine decently with the specific starter I upgraded to. However, this jump pack? At ZERO degrees Fahrenheit, this jump pack cranks the engine over even faster than the dual batteries in the truck do! Because of where I am and my current vehicle situation, I'm having to jump the truck virtually every time I want to go somewhere. The truck's batteries just aren't enough and there's really no easy way to install bigger, more capable batteries under the hood. But, with this jump pack? I don't have to worry about whether the truck will start or not. It's virtually guaranteed it will. Without this jump pack, I'd be stuck most of the time in winter! You could call it peace of mind and you'd be accurate! If you're on the fence between this and a cheap one that's half the price or even a quarter of the price? Do yourself a favor! Forget the cheap ones, they don't stand a chance against this one. If you've got a family and you NEED your vehicle to just WORK regardless of having left that dome light on all night? You won't be disappointed if you have the NOCO Boost X GBX155. It's worth every penny!

This thing is a beast! In the best way. I always have to put it in full override mode to start completely dead vehicles but it always does the job. Mostly working on 70s to 90s V8s. Would start smaller rides without even blinking. I get about 8 to 10 starts on these completely dead vehicles and it charges pretty quick too but I just leave it plugged in over night when needed. It has sat for months under the seat of my truck and was still ready to work when needed. These are well worth the money and so much better than the big bulky units that die if not constantly charged and only jump 2 or 3 times before dieing. Just get one, you'll be happy you did.

I purchased this truly awesome Noco jumpbox probably 4 years ago from Amazon, i have had NO problems, ZERO, ZILCH, NATA, it has been a top tear security blanket for me ,if my Chevy Silverado Z71 battery needs a jump ,no problem, if my chevy battery is 100% dead ($15 core value) at best , if i don't even have a battery this power box will start my motor with true assertiveness. My only complaint would be im to nice I've used it 9 times out of 10 for other people, i should have been charging people $$ but i didn't, so now the word on the street is Andrew will take care of you, after jumping say 5 cars u should recharge it you don't want to have it unprepared months later, easy to use fail safe if u cross wires. Andrew Mongelli

Update November 2, 2024 I purchased a second GBX155, thinking the first time was a fluke… It also failed in less than 13 months, just simply stops turning on… their warranty and repair is totally worthless…I copied it below in the review, costs more than buying a new unit in most cases. Save yourself some hassle and purchase another brand. I have the GBX 155 and it’s smaller brother, I bought them both at the same time in November 2021. They worked great for jumping, but they both died within a few weeks of each-other in September 2023. My old lead acid jumper is has been in service for around 5 years, and still works great. They should last longer than 22 months. Especially with light, occasional uses! Other than dying prematurely, they are nice jump packs. Here’s their awful warranty policies from their website as of 11/2/24. The cost to repair is more than the cost to purchase. In-Warranty: Months 0-12 Within the warranty period, any defective item will be replaced free of charge. Advanced replacement for In-Warranty claims is available with a credit card payment for the full retail amount. The full payment amount will be refunded within 10 business days after return is received. The defective unit must be returned to NOCO within 30 days for a credit to be issued. For claims outside of the scope of the warranty, including accidental damage or abuse, the replacement cost is $499.95. Out-Of-Warranty: Months 13-48 Months 13-24: Any defect is a flat $399.95 Repair Fee per occurrence. Months 25-36: Any defect is a flat $499.95 Repair Fee per occurrence. Months 37-48: Any defect is a flat $599.95 Repair Fee per occurrence. Out-Of-Warranty repairs exclude any claims outside of the scope of the warranty, including accidental damage or abuse. If a unit has damage deemed outside of the scope of warranty by NOCO, the customer is responsible for all shipping costs to have the unit returned. It is the sole discretion of NOCO to determine if damage is outside of the scope of the warranty. Advanced replacement options for Out-Of-Warranty depends on product availability and requires a credit card payment for the full retail amount that is currently listed on our website. The full payment amount, minus repair fee indicated above, will be refunded within 10 business days after return is received. The defective unit must be returned to NOCO within 30 days for a credit to be issued. If the defective unit is damaged or deemed outside of the scope of the warranty by NOCO, the customer must return the replacement unit within 15 business days or forfeit the full payment for the unit. To begin the warranty process, please contact [email protected]. To expedite the process, please send a digital copy of your proof of purchase, the units serial number, and detailed description of the problem.

My 2017 Land Rover Range Rover Sport's battery died while visiting someone for Christmas. The temps went down into the teens for a few evenings and I had never changed my battery. The battery died overnight. So I purchased this to get the vehicle / battery turned over in order to drive and get a new battery installed. It worked like a charm. The Rover is a diesel requiring the extra power from the booster. I used it twice before getting the battery replaced. Easy to use, easy to charge the vehicle, and compact enough to keep in the vehicle.

The NOCO Boost X GBX155 has been a great addition to my toolbox. It has more than enough power to jump big engines, and it starts vehicles instantly without any hassle. The unit feels solid and well-built, and the clamps are high quality compared to cheaper jump starters. I like that it also doubles as a power bank in a pinch, and the display makes it easy to see charging levels. Overall, it’s reliable, easy to use, and strong enough to handle anything from cars to trucks. Exactly what you want in an emergency jump starter.

I purchased the NOCO Boost X GBX155 4250A 12V UltraSafe Portable Lithium Jump Starter with high hopes, but unfortunately, it stopped working within a year of use. However, I am pleased to share that my experience with the warranty process was smooth and hassle-free. Initially, I was disappointed when the jump starter failed to function properly after such a short period. However, I reached out to the manufacturer for assistance, and they promptly guided me through the warranty claim process. They were responsive and understanding, providing clear instructions and promptly approving my claim. The fact that they stood behind their product and honored the warranty gives me confidence in their commitment to customer satisfaction. Prior to the issue, I found the performance of the NOCO Boost X GBX155 to be reliable and impressive. It delivered the power needed to jump-start my vehicle without any issues, even for larger engines. The inclusion of USB-C charging capabilities was also a convenient feature, allowing me to charge my electronic devices on the go. The compact and portable design made it easy to carry and store in my vehicle, ensuring it was readily available for emergencies. While the malfunction within the first year was disappointing, the excellent warranty support provided by NOCO was commendable. I appreciate their commitment to rectifying the situation promptly and effectively. This positive experience with their customer service offsets the initial frustration of the product’s failure. In conclusion, the NOCO Boost X GBX155 4250A Jump Starter, although it stopped working within a year, proved to have reliable performance and useful features during its operational period. The responsive and efficient warranty support provided by NOCO demonstrates their dedication to customer satisfaction. I still believe this jump starter is a solid choice, and I am hopeful that the replacement unit will serve me well in the long run.

Got one for me first… loved it so got the newest one for my son-in-law. Such an awesome tool. I have had to use the EXTRA boost a few times for a 100% dead battery, perfect. Only comment of concern: the instructions are much better by end users on YouTube, especially for the extra boost.