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 | Spark-Proof & Reverse Polarity Protection, For Car, Truck, Motorcycle, SUV, Boat, ATV, RV, up to 10.0L Gas & 8.0L Diesel

I’ve had this battery booster for over a year now. Gotta say, I had no idea how helpful these things are. I went with the 4250A as I have a big ol’ diesel truck, but it works on all my toys. I’ve used it on my Jeep, the diesel truck of course, my zero turn mower, and my dirt bikes. It’s never let me down as of yet. I find it takes about 3 or 4 hours to fully charge if you’re using a high quality USB-C cable, and I can get 7-10 jumps from it until needing to charge again. Though, the amount of usages is gonna depend on what you’re jumping. Meaning, the diesel truck takes way more power to start than the Jeep. In conclusion, I think this should be in everyone’s tool kit. I highly recommend 🤘

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!

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.

This product looks and feels it’s made To be really tough. I had a smaller version of this for years but now I’m dealing with transporting cars in the snow which are completely dead at times. Will update in a few months about the performance of this particular unit. I am a little disappointed with one key factor as advance as this looks I was very surprised not to have a C port to C port charger. This unit was way too expensive not to have that included with the product. Also the two A USB out ports are only 2.1A. That is nuts, as advanced this unit is Those A ports should be higher amps in the year 2024. My $50 portable phone charger has higher amp in its A USB out port. Do!!! not invest GB-X series of Nico products. This is hands-down, an inferior line of products Compare to GB models. I am a true believer in Nico products. I had GB 40 for 4 1/2 years and GB 50 for about six years. My GB 50. So considering that, I decided to go a step up and invest a serious amount of money and get GBX 155, Big mistake on my part like big mistake. my GB 50 had more backbone than this GBX 155. For Contrast I jumpstarted two dead batteries Off Jeep patriots, a dead battery of a F150, And a dead battery of a Chevy Malibu. And this jump box was dead, Down to its last bar. Compare to the GB 50 I was able to jumpstart almost 9 cars before it died out. I will be sending this back through warranty. Hopefully they find that there’s something wrong with this and fix it but if they tell me nothings wrong with it, they can keep it. Pls !!!!! Don’t buy noco GBX models. Not a good product I still recommend Nico GB models. They are way better.

"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."

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.

Using this jump starter under severe Minnesota weather conditions, I have put this thing through every possible scenario I could think of so here are my personal observations... - Jump started over 1,000 vehicles in the course of two years - Used in 125 jobs in the last 132 days... business has been slow compared to previous year - Cars serviced range from full electric to 8 cylinder old beaters where the 12 volt batteries were either very low to fully crank engine to depleted and bad alternators that didn't held engine to run for two minutes. - 5 vehicles were unsuccessful to start due to electrical issues or vehicle's manufacturer defects that pushed beyond the capabilities of this jump-starter - Quickly charging inside the truck using 12V plug provided offered non-stop daily use - Heavier jumpstarts will consume lithium battery quickly, avoid using override button if battery is low - Don't leave in cold weather vehicle under 30 degrees, this impacts jumpstart readiness Why did I rated at 4 stars? The unit stopped taking a charge after a heavy jumpstart that required use of override button two times on a Ford Escape SUV, not something I would have imagined, this unit has done diesel engine starts without an issue, but when the lithium battery discharges so quickly it will go dormant and may not come back when plugged in. When searching for this issue others have experienced the same outcome and NOCO would not honor warranty after two years. NOCO Boost line seems to have a limit that prevents it from discharging like that but the NOCO Boost X fires much quicker and can jumpstart almost anything but could potentially die quicker. In conclusion... Read the manual and watch NOCO's how to videos before you cause a preventable damage on your unit.

Works great! I have a smaller one made by GooLoo that works decent but no longer works as good as it used to, and any time it's below 50% battery it constantly turns itself back off, so I started looking for a new jump starter. Opted for this one and I've had zero issues since switching from GooLoo to this one. Overall it isn't "too smart" to the point it becomes annoying or useless, and when fully charged has even managed to help start my 5.9L Cummins diesel pusher class A RV. Super easy to use and has basic safety features built in. I love its overall size and portability. If you do not have a 60 watt power supply with a matching cable, it will take a little while to charge, however. Though as long as I remember to plug it in overnight after using it I've had no issues with it usually being fully recharged by the following morning. I've had Snap-On jump boxes that didn't last more than two years before no longer working. So far about 6 months in and this one is still working great!

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.

Ho acquistato il NOCO Boost X GBX155 per avere un avviatore di emergenza affidabile sia per auto che per furgoni diesel. L’ho testato su una batteria completamente scarica di un 3.0 turbodiesel: in pochi secondi ha avviato il motore senza alcuno sforzo. La potenza da 4250A è reale, e si percepisce dalla velocità con cui eroga corrente. Oltre alla funzione di avviamento, può essere usato anche come power bank per ricaricare smartphone, tablet o altri dispositivi grazie all’uscita USB-C PD. L’interfaccia è semplice e intuitiva, con led ben visibili anche in pieno sole. Punti di forza: • Potenza elevatissima, adatta anche a motori diesel di grossa cilindrata • Avviamento rapido anche con batteria completamente morta • Funzione torcia e power bank USB-C molto utili • Cavi robusti e morsetti di qualità, con protezione intelligente contro inversione di polarità Unico difetto: Non è economico, ma per chi cerca un prodotto professionale e vuole stare tranquillo in ogni situazione, è un acquisto che si ripaga da solo al primo uso. Conclusione: Uno strumento indispensabile per chi lavora con veicoli o semplicemente vuole sicurezza in auto. Qualità costruttiva eccellente, potenza reale e facilità d’uso. Lo consiglio senza riserve e lo ricomprerei subito.

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