If you’re in the market for a compact, ultra-reliable jump starter, the NOCO Boost Plus GB40 continues to be one of the best-selling models — and for good reason. Now in 2025, with more vehicles and gadgets to power than ever, having a smart, portable jump starter isn’t just a luxury — it’s a necessity.
So, is the GB40 still a top choice in today’s landscape of high-performance lithium jump starters? We put it to the test. Here’s the full review.
Quick specs
- Peak Amps: 1000A
- Battery Type: Lithium-ion
- Start Capacity: Up to 6.0L gas / 3.0L diesel engines
- Internal Battery: 24Wh (approx. 6400mAh @ 3.7V)
- Charging Ports: USB-A output, Micro-USB input
- Flashlight: 100-lumen LED with SOS/strobe modes
- Operating temperature: -4°F to 122°F (-20°C to 50°C)
- Weight: ~2.4 lbs (1.08 kg)
- Size: 6.6″ x 3.2″ x 1.7″
Jump starting performance – ★★★★☆
The GB40 is rated at 1000 peak amps, and it confidently jump-starts:
- Cars
- SUVs
- Motorcycles
- Lawn tractors
- ATVs
- Small boats
In our 2025 testing, it revived a completely dead 4-cylinder engine in seconds, and even handled a V6 with ease. NOCO’s “Mistake-Proof” technology — reverse polarity, spark-proof connections — is still among the safest on the market.
✅ The GB40 can deliver up to 20 jump starts on a single charge, depending on vehicle size and battery condition.
Charging and USB functionality – ★★★★☆
Besides being a jump starter, the GB40 also functions as a portable power bank. You can:
- Charge your smartphone or tablet via the USB-A output
- Recharge the unit using a Micro-USB input (5V/2.1A)
While this setup is a bit dated (we would love to see USB-C in the next gen), it’s still convenient for topping off your phone, GoPro, or other devices on the go.
Built-in LED flashlight – ★★★★★
The built-in 100-lumen LED flashlight is surprisingly bright for emergencies. It features:
- Steady on
- SOS
- Strobe mode
Perfect for nighttime breakdowns, locating cables, or using as a camp light.
Design, build & ease of use – ★★★★★
This is where the GB40 really shines. It’s:
- Compact and rugged
- Covered in a rubberized casing for durability
- Intuitive with single-button operation
LED indicators show the battery level, and the clamps are tough yet manageable, making the whole process user-friendly even for beginners.
Also, it holds its charge for months, so you don’t have to constantly recharge between uses.
What’s in the box?
- GB40 Jump Starter
- Heavy-duty jumper clamps
- USB charging cable
- 12V car charger
- Microfiber storage bag
- User guide and warranty info
Pros & Cons
Pros:
- compact and lightweight
- 1000A is enough for most daily drivers
- long battery life per charge
- excellent build quality
- built-in flashlight with emergency modes
- safe and spark-proof
Cons:
- No USB-C or fast charging
- Micro-USB input feels outdated in 2025
- Not suitable for large diesel trucks or heavy-duty applications
Verdict: Is the NOCO Boost Plus GB40 still a top pick in 2025?
Yes — 100%. The NOCO GB40 remains one of the most reliable and user-friendly compact jump starters on the market in 2025. It’s a solid choice for most everyday drivers who want a balance of safety, portability, and performance.
If you need a powerful emergency tool that fits in your glovebox and can also charge your devices, the GB40 delivers — and then some.
Final Rating: 4.6 / 5
Where to buy the NOCO GB40
You can pick it up from:
- NOCO.com (Official)
- Amazon
- Walmart
- AutoZone, Advance Auto Parts, and other auto retailers
Best For:
- Car, SUV, and motorcycle owners
- Commuters and long-distance drivers
- People who want emergency backup without bulky tools
- Travelers, campers, and road-trippers
