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NOCO Boost Plus GB40 Review: Is It Worth It?
The NOCO Boost Plus GB40 is a compact 1000-amp lithium jump starter with advanced safety features. Our editorial team compared specifications, buyer feedback and key decision factors to see if it delivers on its promise of reliable, worry-free jump starting for everyday drivers.
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The NOCO Boost Plus GB40 is a top-tier portable jump starter that balances power, safety, and portability. Its 1000-amp peak current can start most gasoline engines up to 6.0L and diesel engines up to 3.0L. The spark-proof circuitry, reverse polarity protection, and built-in LED flashlight make it a reliable companion. While not powerful enough for heavy-duty trucks, it excels for everyday cars, SUVs, and motorcycles. The build quality is excellent, with a rugged, water-resistant casing. Over 18,000 positive reviews confirm its popularity. If you need a compact, safe, and effective jump starter, the GB40 is a solid investment.
How it scores
The good and the annoying
- Compact and lightweight design, easy to store in glovebox
- Advanced safety features: spark-proof, reverse polarity protection
- Can jump start engines up to 6.0L gas / 3.0L diesel
- Built-in LED flashlight with emergency modes
- Rugged, water-resistant casing (IP65 rated)
- Not powerful enough for large diesel trucks or heavy equipment
- Battery capacity may require recharge after multiple jumps
- Cable length could be longer for some vehicle layouts
- Higher price compared to some competitors with similar specs
The NOCO Boost Plus GB40 has become a household name in the portable jump starter market, boasting over 18,000 positive reviews. But does it live up to the hype? Our editorial team compared specifications, buyer feedback and key decision factors to bring you an honest assessment. This review covers its design, performance, safety features, and real-world usability for everyday drivers.
Design and Build Quality
The GB40 features a compact, rugged design that fits comfortably in the palm of your hand. Its outer casing is made of durable, impact-resistant plastic with a rubberized coating for grip. The IP65 rating means it is dust-tight and can withstand light rain or splashes. The unit weighs only 2.4 pounds, making it easy to store in a glovebox or center console. The integrated LED flashlight is bright and includes SOS and strobe modes for emergencies. The clamps are heavy-duty with copper-plated jaws and a clear indicator light showing proper connection. Overall, the build quality inspires confidence.
Performance and Jump-Starting Power
The GB40 delivers 1000 peak amps, which is sufficient for most gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters. In real-world use, it can start a dead battery in seconds. The unit automatically detects battery voltage and adjusts output accordingly. It can also jump-start vehicles with completely dead batteries (down to 2 volts). However, for larger diesel trucks or heavy equipment, the GB40 may struggle. Users report that it can start a V8 gasoline engine without issue, but multiple jumps in a row may drain the internal battery. For heavy-duty needs, consider the NOCO Boost HD GB70 with 2000 amps.
Ease of Use
Using the GB40 is straightforward: connect the red clamp to the positive terminal and the black clamp to a ground point or negative terminal. The smart technology prevents sparks if clamps touch each other or are connected incorrectly. The unit has a simple power button and a battery status indicator. The included manual is clear, but the device is intuitive enough for most users. One minor complaint: the cable length is about 12 inches, which can be short for some vehicles with awkward battery placement. A longer cable would be helpful.
Safety Features
Safety is a major selling point. The GB40 includes spark-proof technology, reverse polarity protection, over-current protection, and over-temperature protection. It will not power on if the clamps are connected incorrectly, preventing damage to the vehicle or the unit. The built-in battery management system ensures safe charging and discharging. These features make it suitable even for beginners who may be nervous about jump-starting a car.
Common Buyer Complaints
While overwhelmingly positive, some users have noted issues. A few report that the unit stopped holding a charge after a few months, though this seems rare. Others wish for a higher capacity to jump-start larger engines or to use as a power bank for longer. The USB output is limited to 2.1A, which is fine for phones but slow for tablets. The lack of a wall charger in the box (only a 12V car charger) is another minor inconvenience. However, most agree that for its intended use, the GB40 performs admirably.
Comparison to Similar Models
Compared to the NOCO Boost X GBX45, the GB40 is slightly less powerful (1000 vs 1250 amps) but more affordable. The GBX45 has a higher IP rating (IP67) and can jump-start larger engines. Against the Clore Automotive Jump-N-Carry JNC660, the GB40 is much more portable but less powerful (1000 vs 2200 peak amps). The JNC660 is better for heavy-duty use but is heavier and bulkier. The GOOLOO GP4000 offers similar specs at a lower price, but build quality and safety features are not as refined. Overall, the GB40 strikes a good balance for most drivers.
FAQ
How many times can the NOCO Boost Plus GB40 jump-start a car?
On a full charge, it can jump-start a standard gasoline car about 20 times, depending on engine size and temperature. For diesel engines, expect fewer jumps.
Is the NOCO Boost Plus GB40 safe to use in the rain?
Yes, it has an IP65 rating, meaning it is dust-tight and protected against low-pressure water jets. However, avoid submerging it.
Can the GB40 charge my phone or tablet?
Yes, it includes a USB port for charging smartphones, tablets, and other small devices. It acts as a power bank.
How long does it take to fully charge the GB40?
Using the included 12V car charger, it takes about 3-4 hours. With a USB charger, it may take longer.
Does the GB40 come with a carrying case?
Yes, it includes a microfiber storage bag and the necessary clamps and charging cables.
Specs that matter
| Peak Current | 1000 amps |
| Engine Support | Up to 6.0L gas / 3.0L diesel |
| Battery Type | Lithium-ion |
| Capacity | 12V, 14.4 Wh |
| Weight | 2.4 lbs (1.1 kg) |
| Dimensions | 6.9 x 3.4 x 1.7 inches |
You drive a standard car, SUV, or motorcycle and want a compact, safe, and reliable jump starter with extra features like a flashlight. Ideal for emergency roadside use.
You need to jump-start large diesel trucks, heavy machinery, or multiple vehicles in one session. Consider a higher-amp model like the NOCO Boost HD GB70.
Questions before you buy
How many times can the NOCO Boost Plus GB40 jump-start a car?
On a full charge, it can jump-start a standard gasoline car about 20 times, depending on engine size and temperature. For diesel engines, expect fewer jumps.
Is the NOCO Boost Plus GB40 safe to use in the rain?
Yes, it has an IP65 rating, meaning it is dust-tight and protected against low-pressure water jets. However, avoid submerging it.
Can the GB40 charge my phone or tablet?
Yes, it includes a USB port for charging smartphones, tablets, and other small devices. It acts as a power bank.
How long does it take to fully charge the GB40?
Using the included 12V car charger, it takes about 3-4 hours. With a USB charger, it may take longer.
Does the GB40 come with a carrying case?
Yes, it includes a microfiber storage bag and the necessary clamps and charging cables.