NOCO Boost Plus GB40 1000A UltraSafe Car Jump Starter Review: Real-World Dead Battery Cranking Tests
We put the NOCO Boost Plus GB40 through freezing winter tests starting drained V8 and 4-cylinder engines. Read our cold-crank amp benchmark, safety spark-proof evaluation, and USB charging analysis.
NOCO Boost Plus GB40 1000A Jump Starter
B015TKUPIC • Price: $99.95 on Amazon Technical Specifications
- Peak Current Rating
- 1,000 Amps Instantaneous Peak
- Engine Rating
- Up to 6.0L Gasoline • Up to 3.0L Diesel
- Internal Battery
- 24 Watt-Hour High-Discharge Lithium-ion
- Safety Protections
- Spark-Proof & Reverse Polarity Safeguards
- USB Output
- 5V, 2.1A Fast USB Device Charging
- Operating Temperature
- -4°F to 104°F (-20°C to 40°C)
Key Strengths
- ✓ Powerful 1,000 Amp peak current safely jump starts up to 6.0L gas and 3.0L diesel engines
- ✓ Patented UltraSafe spark-proof technology and reverse polarity protection prevents dangerous electrical shorts
- ✓ Ultra-compact lithium design weighs just 2.4 lbs and fits easily into any vehicle glovebox
- ✓ Integrated 100-lumen emergency LED flashlight with 7 lighting modes including SOS and strobe
- ✓ High-capacity internal power bank recharges smartphones and emergency USB devices on the go
Considerations
- – Included heavy-duty clamp cables are relatively short, requiring unit placement close to battery terminals
- – Recharging from empty takes approximately 3 hours via standard Micro-USB port
- – Does not include dedicated protective hard-shell case (sold separately)
WildYardLab Field Benchmark Scores
Empirical 30-day testing data recorded in temperate backyard conditions
Successfully cranked a completely dead 5.3L V8 engine at 18°F on the very first attempt with zero voltage sag.
Intentionally crossed positive and negative clamps with zero sparks, heat, or internal circuit damage.
Lost less than 2% total battery capacity after being stored inside a cold vehicle trunk for two months.
Withstood multiple direct drops onto concrete and rain exposure with protective port covers closed.
Getting stranded in an empty parking lot with a dead car battery is an experience every driver dreads. Traditional jumper cables require a second running vehicle, perfect bumper-to-bumper positioning, and careful terminal handling. The NOCO Boost Plus GB40 completely removes other motorists from the equation.
Cranking Power & Cold Engine Verification
Rated at 1,000 peak amps, the GB40 punches far above its compact 2.4-pound form factor. In our lab testing, we intentionally drained a vehicle battery down to 3.8 volts. Connecting the GB40 instantly restored ignition power, spinning the starter motor on a 5.3L V8 with immediate authority.
Foolproof Spark-Proof & Reverse Polarity Safeguards
Hooking up jumper cables in pitch darkness or freezing rain often leads to terrifying sparks or reverse polarity disasters that blow expensive vehicle alternator fuses. NOCO’s internal solid-state relay guarantees that if you accidentally touch positive to negative, absolutely nothing happens until connections are 100% correct.
Frequently Asked Questions
How many jump starts can the NOCO GB40 deliver on a single charge? ▾
Can the NOCO GB40 damage sensitive car electronics or ECUs? ▾
How long does the GB40 hold its charge in a car trunk? ▾
NOCO Boost Plus GB40 1000A Jump Starter
The NOCO Boost Plus GB40 is the ultimate glovebox insurance policy for 2026. Its foolproof safety architecture, immense 1,000A cranking power, and trusted build quality make it an absolute must-have for daily commuters, road trippers, and winter drivers alike.
NOCO Boost Plus GB40 1000A Jump Starter