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

I bought this in January 2024 and I was not disappointed! This thing is a beast. Where other jumpers fail, this one works all the time. It’s very easy to use. The battery life is long. I highly recommend this to everyone. My son and brother are fighting over who gets to keep it. So far brother is winning. He is hiding it from my son! Excellent product!

It’s awesome

This particular model sits on the threshold of commercial and home use. If you are only jumping the occasional four or six-cylinder passenger vehicle, it is probably excessive for your needs. If you have a need to potentially jump multiple vehicles in a day or vehicles with larger engines, or a combination therof, the GBX155 will suit you well. Also, it is easily stored in the optional storage case, which I recommend, and is both smaller and lighter than other competitors with similar capabilities.Will start anything from a medium-duty truck and below with little to no issue in sub-zero conditions. It just might need a top off charge right after if you are jumping something more demanding, such as a mid-size to larger diesel engine or large gas engine in colder weather, which isn't difficult and can be done via USB-C fast charge in your vehicle between calls with the appropriate charger.I use this model for roadside assistance duty and it has no problem keeping up with jumping battery after battery in below freezing conditions so long as you monitor the battery level after each use and top off accordingly (much below a green charge level in colder weather and it will start to struggle with bigger engines if the battery is completely dead).Pro Tip: do not leave this, or any other NOCO chargers in your vehicle during extreme (hot or cold) temperatures. If they are too hot or cold, they will not provide power to your vehicle battery.

Update November 2, 2024I 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 0-12Within 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 13-48Months 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 support@no.co. To expedite the process, please send a digital copy of your proof of purchase, the units serial number, and detailed description of the problem.

Very good

This is the perfect size to be able to jump off your diesel truck if you batteries are dead. I tried the traditional way, but didn’t work. This started the truck right up. 2019 RAM 2500

Works fine. My only knock on it is the instructions/booklet type is way too small to easily read.

Fue un regalo y la persona quedó encantada funciona perfectamente