The NOCO Boost Plus GB40 is an excellent compact jump starter for everyday drivers who want a safe, portable backup power solution for smaller gasoline vehicles, though larger trucks or diesel owners will need a more powerful NOCO model.
In-depth review
The NOCO Boost Plus GB40 is a compact lithium-ion jump starter engineered to deliver reliable starting power for cars, trucks, and SUVs with gasoline engines up to 6 liters. Built around NOCO's UltraSafe technology, it provides up to 1000 amps of peak current while remaining spark-proof and reverse polarity protected, making it a safer alternative to traditional lead-acid jump starter packs. Its rugged, weatherproof housing is designed to withstand the rigors of a truck bed, trunk, or garage shelf, ensuring it is ready when a dead battery strikes.
Beyond emergency starts, the GB40 doubles as a portable USB power bank, capable of recharging phones, tablets, and other USB devices multiple times on a single charge. An integrated LED flashlight offers seven light modes, including SOS and emergency strobe, adding versatility for roadside emergencies or everyday outdoor use. The unit charges quickly via a standard micro-USB cable and holds its charge for months, so it is not constantly tethered to an outlet.
Designed with portability in mind, the GB40 weighs under two pounds and fits easily into a glovebox or backpack. Clamps feature heavy-duty cables with intuitive color coding, and the device includes onboard diagnostics that alert users to incorrect hookups. For drivers seeking a compact, no-nonsense solution to battery failure, the NOCO Boost Plus GB40 balances power, safety, and convenience in a single handheld unit.
Key features
- 1000 amp peak current output
- Jump-starts up to 6-liter gasoline engines
- UltraSafe spark-proof clamp technology
- Built-in USB power bank for devices
- 7-mode integrated LED flashlight with SOS
- Compact, lightweight design under 2 lbs
- Long-lasting lithium charge retention
What we liked
- Very compact and lightweight for storage
- Spark-proof clamps enhance user safety
- Doubles as phone charger and flashlight
- Fast micro-USB recharging
- Holds charge for extended periods without use
Worth noting
- Limited to smaller gasoline engines only
- No diesel engine support
- Micro-USB charging feels outdated
- Clamps can feel small for larger battery terminals
What owners say
Saved my morning commute
My battery died in a parking lot and this little device started my sedan instantly. Super easy to use and small enough to keep in the glovebox.
Great backup power
Works well as advertised. I mainly use it for phone charging on camping trips, and it's jumped my car twice without issue.
Compact and reliable
Solid build quality and the flashlight modes are a nice bonus. Wish it had USB-C but overall very happy.
Peace of mind in my trunk
I keep this in my trunk year-round. It's reassuring knowing I can jump my own car without waiting for roadside assistance.
