NOCO Boost GB40 12V 1000A UltraSafe Portable Lithium Jump Starter
A dead vehicle battery is unpredictable, but carrying heavy, tangled jumper cables or waiting for a tow truck doesn’t have to be your default solution. The NOCO Boost GB40 is one of the most widely trusted compact lithium jump starters on the market. Engineered to fit right inside your glove box or door pocket, it provides safe, reliable starting power without taking up valuable trunk space.
Why You Need a Portable Jump Starter
Complete Independence: Start your vehicle on your own schedule without needing another car or asking strangers for help.
Tight-Space Maneuvers: No need to align two vehicles front-to-front in tight parking garages or crowded driveways.
Zero-Mistake Safety: Built-in safeguards make dangerous arcing and incorrect connections virtually impossible.
Backup Emergency Utility: Functions as a pocket-sized power bank and bright multi-mode LED torch during roadside delays.
Key Specifications
| Feature | Specification |
| Peak Current | 1000A |
| Engine Rating | Up to 6.0L Gas / 3.0L Diesel |
| Internal Battery | 24Wh Lithium-Ion |
| Recharge Speed | ~3 Hours via USB-C (5V/2.1A) |
| Outputs | 2.1A USB-A Power Bank Port |
| Flashlight | 100-Lumen LED (7 Light Modes) |
| Durability Rating | IP65 Weatherproof & Rubberized Housing |
Top Features & Performance Breakdown
Patented UltraSafe Technology
With a 2000A peak current, the Alpha85 revives completely dead 12V batteries. It easily turns over high-displacement engines—up to 8.5L gaThe standout feature of the GB40 is its mistake-proof design. The clamps remain completely cold and spark-free until a correct connection is confirmed. Reverse-polarity protection prevents electrical damage if you accidentally swap positive and negative terminals. s and 6.0L diesel—making it suitable for everyday sedans, heavy-duty pickups, and boats.
Practical Engine Coverage in a Glove-Box Form
Delivering 1000A peak current, the unit starts gasoline engines up to 6.0L and diesel engines up to 3.0L. Weighing only 2.4 lbs, it handles everyday sedans, crossovers, mid-size SUVs, and light trucks effortlessly.
Emergency Power Bank & 100-Lumen Light
Beyond jump starting, the built-in USB port tops off smartphones, wireless earbuds, and tablets when you’re off the grid. The 100-lumen LED light features 7 modes, including low/high beams, strobe, and emergency SOS patterns.
Integrated Manual Override for Completely Dead Batteries
When a battery drops below 2 volts, standard automatic detection may not trigger. The GB40 includes a dedicated Manual Override button (“!”) that forces power directly to the clamps to revive deeply discharged batteries.
Pros:
- Highly compact (glove-box friendly),
- Mistake-proof UltraSafe connection design,
- Holds charge up to 12 months,
- Rugged IP65 build.
Cons:
- Limited to 3.0L diesel engines (not meant for heavy 3/4-ton trucks),
- Battery capacity is optimized for quick jumps rather than multiple full laptop charges.
Frequently Asked Questions
Yes. The GB40 works with any 12V ignition system, including motorcycles, ATVs, jet skis, and lawnmowers. To start safely, attach the red clamp to the positive terminal, the black clamp to a bare metal frame point, and allow the unit to manage current delivery.
It is rated for gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters. This covers almost all standard passenger cars, crossovers, small-to-midsize SUVs, and light pickup trucks.
Yes. The GB40 retains roughly 70% of its total charge for up to 12 months when powered off. For best readiness, top it off every 3 to 6 months and after every jump-start use.
Yes. The built-in 2.1A USB port functions as a portable power bank, capable of providing 1 to 2 full recharges for standard smartphones depending on model capacity.
Recharging from empty takes approximately 3 hours when connected to a 2.1A USB charger via the included USB-C cable. It can be recharged from standard wall adapters, car USB outlets, or computer ports.
No. NOCO includes a heavy-duty USB-C charging cable, but no AC wall block. It works with any standard USB wall block, car adapter, or power outlet you already own.
NOCO Boost GB40 12V 1000A UltraSafe Portable Lithium Jump Starter Spark-Proof & Reverse Polarity Protection, For Car, Truck, Motorcycle, SUV, Boat, ATV, RV, up to 6.0L Gas & 3.0L Diesel
4.6 out of 5 stars (128,987)
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of peak lithium power. Up to 20 starts per charge on engines up to 6.0L gas and 3.0L diesel.
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