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NOCO

NOCO Boost GB40 UltraSafe Jump Starter

★★★★½ 4.7/5 (4 customer reviews)
Overall Score4.7/5.0
Expert Verdict

The NOCO Boost GB40 UltraSafe Jump Starter is an excellent investment for drivers seeking a reliable, safe, and portable jump-start solution. Its combination of power, safety, and additional features like USB charging make it highly versatile. Recommended for anyone looking to be prepared for unexpected battery failures without carrying bulky equipment.

Key Features

  • 1000 amps peak current for jump-starting up to 6L gasoline and 3L diesel engines
  • UltraSafe technology with spark-proof and reverse polarity protection
  • Multi-function LED flashlight with seven modes including SOS and strobe
  • Built-in USB ports for charging smartphones and other devices
  • Compact, lightweight design with a rechargeable lithium-ion battery
✓ Pros
  • Highly effective and fast jump starts for a variety of vehicles
  • Safety features reduce risk of accidents during use
  • Versatile with additional flashlight and USB charging capabilities
  • Compact design makes it easy to carry and store
✗ Cons
  • May require frequent recharging if not used regularly
  • Limited jump-starts per charge compared to larger models
  • Not suitable for very large diesel engines over 3 liters

Full Review

The NOCO Boost GB40 UltraSafe Jump Starter is a compact yet powerful automotive battery booster designed to safely jump-start 12-volt batteries on cars, trucks, motorcycles, and boats. Its rugged design and ultra-safe technology make it an essential tool for any vehicle owner, providing peace of mind during roadside emergencies. The GB40 delivers 1000 amps of peak current, which is enough to jump-start engines up to 6 liters gasoline and 3 liters diesel quickly and efficiently.

Featuring advanced spark-proof technology and reverse polarity protection, this jump starter ensures user safety by preventing dangerous sparks and incorrect connections. The device also includes a multi-function LED flashlight with seven modes, including SOS and emergency strobe, making it handy for nighttime situations or roadside assistance.

Beyond jump-starting, the NOCO GB40 doubles as a portable power bank with USB ports to charge smartphones, tablets, and other USB-powered devices. Its long-lasting lithium-ion battery provides multiple jump starts on a single charge and charges quickly via USB. Compact and lightweight, the GB40 is easy to store in a glove compartment or emergency kit, making it a reliable companion for everyday driving or travel.

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Customer Reviews

James R. March 2025
★★★★★
Lifesaver in an Emergency
I used the NOCO GB40 to jump-start my car when the battery died unexpectedly. It worked flawlessly and was very easy to use even with limited knowledge. The safety features gave me confidence while hooking it up.
Emily W. January 2025
★★★★☆
Great Compact Jump Starter
This jump starter is small but powerful. I appreciate the built-in flashlight and USB charging ports. The only downside is I have to remember to keep it charged since it loses power over time.
Mark T. February 2025
★★★★★
Perfect for Road Trips
I brought this along on a long road trip and it gave me peace of mind. The jump starter worked perfectly on my motorcycle and car. The flashlight was useful at a nighttime stop as well.
Sophie L. December 2024
★★★★☆
Reliable and Easy to Use
The NOCO GB40 is straightforward to operate with clear indicators. It’s not for very large diesel engines, but for my sedan it’s been reliable. The additional USB ports are a nice bonus.