You are stranded in a parking lot with a dead battery, and you need a reliable jump starter that works every time. NOCO has built a reputation for producing some of the safest and most powerful lithium jump starters on the market. In this guide, we evaluate three top-tier NOCO models: the compact GB40, the mid-range GB70, and the extreme-performance GBX155. Whether you drive a compact car, a large SUV, or a heavy-duty diesel truck, we help you find the right portable booster for your needs. For more context on portable power, check out our best jump starter comparison.
Buying Guide
Peak Amps and Engine Compatibility
The peak amp rating determines how much starting power the jump starter delivers. The NOCO Boost GB40 provides 1000 amps, which is enough for engines up to 6.0L gas and 3.0L diesel. The GB70 offers 2000 amps for larger engines up to 8.0L gas and 6.0L diesel. The GBX155 delivers a massive 4250 amps, suitable for engines up to 10.0L gas and 8.0L diesel. Choose based on your vehicle size; if you drive a heavy-duty truck, the GBX155 is the clear choice. For smaller cars, the GB40 is more than sufficient.
Safety Features
NOCO is known for its UltraSafe technology, which includes spark-proof and reverse polarity protection. This means you can connect the clamps without worrying about sparks or damaging your vehicle’s electrical system. The GBX155 features upgraded UltraSafe 2.0 with enhanced thermal efficiency and power management. All models are engineered to prevent dangerous mistakes, making them ideal for beginners and experts alike.
Portability and Additional Features
Portability matters when you need to store the jump starter in your glove box or emergency kit. The GB40 weighs only 2.5 pounds and is compact enough for any vehicle. The GB70 is larger at 5.0 pounds but still manageable. The GBX155 is the heaviest but offers the most power. All models include integrated LED flashlights with multiple modes, and they double as power banks for charging phones and tablets. For more on emergency tools, see our best car battery charger and maintainer.
Recharge Time and Battery Life
How quickly the jump starter recharges affects its readiness. The GB40 recharges in 3 hours via USB-C, while the GB70 takes 6 hours. The GBX155 features Turbo Charge technology, recharging in just 2.7 hours via USB-C Power Delivery, and can gain enough power for a jump start in 5 minutes. All models provide multiple jump starts per charge, ranging from 20 to 40 starts depending on the model. If you need a fast recharge, the GBX155 is the best choice. For related information, visit our best car battery charger.
Final Thoughts
After evaluating the features and performance of each NOCO jump starter, we recommend the NOCO Boost GB40 12V 1000A UltraSafe for everyday drivers who want a compact, affordable, and reliable booster for their car or small truck. For those who need extreme power for large diesel engines or heavy-duty vehicles, the NOCO Boost GBX155 4250A UltraSafe Jump Starter delivers unmatched performance with rapid recharge and advanced safety. Both models are backed by NOCO’s proven engineering and will keep you prepared for any roadside emergency.
Frequently Asked Questions
What is the difference between the NOCO GB40 and GB70?
The GB40 offers 1000 peak amps and is ideal for smaller vehicles, while the GB70 provides 2000 peak amps for larger engines. The GB70 also supports up to 40 jump starts per charge compared to 20 for the GB40. Both models include UltraSafe technology and integrated LED flashlights.
Can I use a NOCO jump starter to charge my phone?
Yes, all three NOCO models double as portable power banks. They include USB ports for charging smartphones, tablets, and other devices. The GBX155 even features 60-watt USB-C Power Delivery for fast charging of laptops and other high-power electronics.
How do I maintain my NOCO jump starter for long battery life?
To extend the lifespan, recharge the jump starter every three months when not in use. Store it in a cool, dry place away from extreme temperatures. NOCO recommends using the included USB-C cable for optimal charging. For more tips, check our jump starters category page.
Is the NOCO GBX155 worth the higher price?
If you own a large diesel truck, RV, or heavy equipment, the GBX155 is worth the investment due to its 4250 peak amps and rapid recharge. For standard cars and small trucks, the GB40 or GB70 offer excellent value at a lower cost. Consider your vehicle size and power needs before deciding.
