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. [ Edit 3/19/26: I forgot to mention in this that I also upgraded my starter to a planetary gear high torque high speed starter, and it STILL doesn't like to catch in colder temps! ] 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!

"Excellent product! It's very easy to use, feels well made, and works exactly as described. It gives me peace of mind knowing I have it for emergencies. I highly recommend it for its quality and reliable performance."

Purchased January 30, 2025. UPDATE April 18, 20206 Changed back to five stars. NOCO support is amazing!!! In spite of the "out of warranty", they had me ship the old one in. They sent me a a New GBX155! I have three of these Jump Starters - one for my car and two of the GBX155s for my two diesel trucks. The are older trucks and sometimes I leave something on inside. They are much safer than jump cables - you never know when someone else makes a mistake. Until the one I describe below, None of my NOCO products have ever had a problem. I have been buying their chargers (NOCO Genius G3500, and larger) and have had them for years. Quality is superb! Now I can say, so is customer service. ********* Original: On March 16, 2026, I discovered it dead. No lights, no nothing. Will not take a charge. I expected a lot more from this.

Bought this back in October 2025 just to keep in my truck for emergencies. Used it only twice now. Once being the other day to start a Honda pilot. Another time used for a Ford F250. Was fully charged when I stored in truck. Noticed it was down a bar without using on anything. Started car fine but put it down to 1 bar. Didn’t think anything of it other than it needed to be charged. Plugged in over night using supplied charger. The next morning checked and it didnt charge at all. First thought maybe a faulty charger. So used another noco brand charger that a friend lent me. Once again left on charger over night. This morning checked and still will not charge over 1 bar. Hardly even lasted me 4 months. Only used twice now. Those were 2 expensive jumps. Pictures shows using the correct charger. And second picture shows it is just flashing on the seconds bar. Even after being plugged in for over 24hrs now. Wouldn’t recommend, or buy again after the cost of product only getting me 2 uses in 4 months. I have used the noco chargers for couple years now on my motors cycles over winter and haven’t had any issues. Was hoping the boost would be same quality but unfortunately is not.

The NOCO Boost X is fantastic! I live on a ranch with numerous tractors, vehicles, mowing equipment, etc. I used it on a tractor that would not start. I hooked it up to the battery and BAM back in business. Tractor working! I highly recommend it. I travel with it inside my RV motorcoach. I am considering purchasing another one to keep inside my vehicle.

What's needed to jump start all these new cars. If you have a newer car that 5 years are newer with the battery under the seat are in the trunk area. You need this one to jump start your car. I work as a tech and work for a luxury brand that's a pain in the ass to jump start do to battery location. Also these newer EV cars that have the 12v battery go dead. You really need a lot of power to get them enough 12v power to place them on the charger to charge the HV battery. Without a good 12v battery the HV battery can not be charged. So you get a car with a dead 12v battery and need to change the HV battery because it's low, you're in trouble. On other cars with the jump points so far from the battery and the battery buried, you need this much power. Love the size and weight compared to older jumpers I've had. So easy to carry to the car. Has held up fantastic with its constant use. Charges up quickly with the higher rate charging plug. You do need to get this unless you want very slow charging with your normal phone charger.

Lots of amps available when charged. I wish it had a way to charge it at home. A 12v or 24v converter? As a USB battery backup it looses it's charge pretty rapidly. It works well, but it is missing a very useful feature Wall charging. As an emergency battery jumper which is what it is, it is fine. Charging it takes a longer time than is actually convenient.

I already have the NOCO Boost Max GB250 (B08V6MJ2NR) which I absolutely love, but the thing is very big, very heavy, very expensive ($1200 currently) and quite frankly has more power than is generally needed to jump-start even a dead Class 8 truck (semi tractor). The GB250 will jumpstart 7 - 12 Freightliners on a single charge, which is awesome, but rarely necessary. I was looking for a smaller jump box that would start one or two trucks on a charge and also be compact enough that I could leave it in my car for when a passenger car or truck might need started. I picked up 2 GBX155 jump boxes for $500 less than a GB250 and between the two they put out 8500 amps compared to the 5250 amps of the GB250. I can keep one GBX155 in may car and then for those times when I anticipate starting multiple trucks, I can put both jump boxes in my car. If one GB155 doesn't have enough power to start a truck, I can connect both of them and have a theoretical 8,500 amps at my disposal. The other reason I wanted a smaller jump box is to be more convenient to take on road trips. My car, like many of today's new cars, does not have a physical key to unlock the doors. In the event that your battery completely discharges while the doors are locked, there is no easy way to get into the car to pop the hood to jumpstart the car. This happening overnight while I am in a hotel isn't all that unlikely but in my life it seems if a bad thing CAN happen, it eventually WILL happen. Having the jump box makes getting into the car easy if it's locked and the battery is dead. All you have to do is connect the jump box to the starter terminals and that will power the car's system so that you can unlock the doors and then pop the hood to jumpstart the car. So far I have jumped a commercial zero turn mower, an ATV, two cars and a truck and all started right up with the GBX155 connected. Depending on the setup of the vehicle you may need to adjust where you are placing the cables to get good contact. The last car I jumped, a Nissan Versa, I had to move the cables several times before getting a good connection but eventually I found the right spot and the car fired right up. A couple things I really like about the GBX155 is that it can be charged by any high output cell phone or notebook charger that uses a Type C charger connection. The other cool feature is that the GBC155 can be used as an external power bank to charge up cell phones, notebooks, flashlights etc. I have not yet tested this feature other than to plug my phone into the unit and see that it was indeed charging.

Démarre un Diesel batterie totalement à plat tel que le CLK 270 CDI 170 cv 6,5 L comme un coucou Suisse ...en un tour de clef. Le plus compliqué est de trouver une bonne prise de terre. 4 démarrages dans le mois sans soucis. Prévoir une nouvelle charge complète du Booster après le 5ème raccordement ou avant par précaution si vous avez un impératif (mieux ne vaut pas forcer votre chance en misant sur un 5ème démarrage). L’EVA Case du GB 150 convient, bien que le GBX155 soit très légèrement plus petit (1 cm de moins en longueur, idem en largeur, même taille en hauteur à 0,05 cm près [données constructeurs]). Malgré cela, pour les maniaques comme moi, je ne le recommande pas car, même s’il est de bonne facture et de finition soignée, il ne s’adapte pas totalement (les câbles des pinces en position de rangement forcent le passage de la niche du Booster et trouve une issue en hauteur de l’EVA Case ce qui est incompréhensible puisque le GBX155 est plus petit que le GB 150. J’ai même essayé de laisser les câbles de chaque côté plutôt que de faire le tour du Booster comme c’est le cas en position de rangement ...c’est pire). Ajoutez à ça une répartition du poids du GBX155 pas au top, et je vous le déconseille fortement. Comprenez que poignée en main l’EVA Case bascule totalement d’un côté (désagréable lors des manipulations). Amazon le mets parmi les produits fréquemment achetés avec le GBX155. Il faudrait peut-être comptabiliser les retours produits, car à mon sens ce n’est pas très pertinent et trompeur compte tenu du fait que ce produit n’est pas totalement adapté. C’est encore pire avec le chargeur XGC4 qui n’est pas du tout compatible et pour cause, la technologie X est déjà dans le GB X 155 (cette technologie dépasse d’ailleurs le seul fait de la charge rapide et concerne entre autre la puissance rendue en ampères) mais la description n’est pas claire et, bien qu’ayant cherché avant achat, je n’ai rien trouvé qui confirmait ou qui indiquait une incompatibilité des 2 produits. De plus, comme je le dis plus haut, les produits sont fréquemment achetés ensemble. Résultat : 1 retour à l’envoyeur et un remboursement à attendre. Pour une charge rapide en 2,7H vous devrez donc chercher (ou plutôt trouver) un chargeur rapide USB A adéquate (perso, je cherche encore). Dommage que NoCo ne prenne pas la peine de préciser les spécificités du chargeur nécessaire ou de recommander une référence à défaut de la produire (l’entrée en charge du Booster est donnée pour 60 Watts... la plupart des chargeurs USB A sont soit au dessous, soit à 65 Watts et plus. Je penses que 65 Watts est donc la meilleure option). Le résultat obtenu avec une prise Type C vers USB A comme celle (à l’époque) fournie avec un iPhone (soit 18 Watts il me semble, voir peut-être 12W ou encore moins ...5W ??!) donne un résultat moins performant que le temps de charge maximale indiqué par le fabricant (comptez 72H pour une charge de 0 à 100%). NoCo doit probablement s’appuyer sur les résultats obtenus avec un chargeur entre 20 et 40 Watts pour garantir une pleine charge au terme de 16H (...quand même). Quant à savoir si un chargeur de 90 Watts ou plus peut permettre une pleine charge en moins de 2,7H... ??? Quid ? Si quelqu’un à des chiffres, je suis à l’écoute. Le plus gros défaut de ce produit reste la taille des câbles USB C de chargement fournis ...ils sont ridiculement petits (particulièrement le câble USB C vers USB A. Cela est moins dérangeant avec le câble USB C vers Prise Allume Cigare). Mieux vaut donc trouver une prise près du sol ou proche d’une table ...sinon vous devrez rester debout durant (minimum) 16H, le chargeur dans les bras ! 🙄😏 MàJ du commentaire de Décembre 2021 : J’ai fait l’acquisition d’un chargeur de marque d’une puissance de 65W (et de technologie GAN II) et d’un câble de 100W à puce (IC E-Marker ?) de la même marque et là c’est juste... une DINGUERIE ! Ça marche du feu de Dieu ! Comptez entre 30 et 35 mn par voyant soit pour 1 quart de charge (25% de la charge totale en une demi-heure ...tout le monde suit ?) soit de 2H à 2H20 max pour une pleine charge de 0 à 100 %, mieux que les données constructeurs qui garantissent une pleine charge en 2,7H soit 2H42. Reste à savoir ce que cela pourrait donner avec un chargeur de même technologie (GAN II) mais d’une puissance de 90W ...ou même de 100W ???!!? 🤩 Dernière MàJ du commentaire : La charge rapide ne donne pas les mêmes résultats qu’une charge lente. Avec la charge ultra lente en 72H j’ai des résultats incroyables. Avec les charges standard et ultra rapide, le produit est simplement très décevant !

Ce n'est pas mon premier Booster NOCO. J'aime la puissance sans limite... Mais avouons que celà devient un peu encombrant. Belle qualité de fabrication. Mais NOCCO ne protège pas sufisement ses boutons. Donc dans un petit sac fournis, il est probable qu'il s'allume tout seul et finisse par vider ses batteries. Un petit morceau de carton suffit a se protéger du problème.

Compré este producto por recomendación, y he de decir que ha sido todo un acierto. En mi opción, tiene un tamaño y peso adecuados para ser transportado de forma frecuente, como es mi caso. Así como una estructura que lo hace manejable a la hora de ser utilizado. Por otro lado, considero importante destacar que la batería dura varios arranques. Lo que me facilita mi día a día, dado que lo utilizo en un ámbito profesional. Ademas, tiene varios extras como literna, que alumbra muy bien y puede resultar de utilidad en ambientes más oscuros o tenues. O bien puede utilizarse de powebank para cargar móviles, linternas o cualquier cosa que se conecte por USB. Sin duda ha sido una buena compra y repetiría.

Very bad, only starts half the cars, my 4 year old 3000amp works better. Has no volt meter either showing what voltage is in battery your connected too

This thing is a beast. It was -47c and my truck was frozen over both batteries completely dead i hooked this this up and started no problem withing 10 seconds of hooking up. Usually I have to hook up 2 cars to my batteries to start my dead truck and that takes about an hour of leaving the cars hooked up to charge the batteries. I also used this on a car with a old battery that wouldn't hold charge in 2 days I ended up using it around 20 times to start my car. every stop id make the car wouldn't start and the battery charge only dropped by 1 line on this thing. I also have had it in my truck for months and holds charge I pulled it out when I need it a few months later and works no problem