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NOCO Boost Plus GB40 Editor Reviewed 1000A peak, up to 6L gas / 3L diesel |
9.4 | 🛒 Check Price |
1. NOCO Boost Plus GB40: Editor Reviewed
Based on specs and verified owner reviews, the NOCO Boost Plus GB40 is a compact lithium ion jump starter that punches above its size with a 1000A peak output. The build feels rugged with a rubberized housing, an integrated LED status panel, and heavy gauge clamps that lock firmly onto battery terminals. It is rated for vehicles up to a 6L gasoline engine or a 3L diesel, which covers the vast majority of sedans, crossovers, and small trucks on the road.
The standout draw is the safety system that NOCO bakes in, including spark proof technology and reverse polarity protection that simply will not deliver current if the clamps are reversed. That makes it one of the least intimidating jump starters for someone using a portable booster for the first time. Beyond starting cars it works as a 5V 2.1A USB power bank for phones and tablets and includes a 100 lumen flashlight with seven modes including SOS and strobe for roadside emergencies.
Verified owner feedback patterns lean strongly positive, with repeat praise for the tiny footprint, the long shelf charge that survives months in a glovebox, and the reassurance of the foolproof clamps. The recurring complaints are equally consistent, namely that the 1000A rating runs out of headroom on larger V8 trucks and bigger diesels, and that recharging the pack itself is slower than people expect. For owners of typical four and six cylinder vehicles, those tradeoffs are easy to accept for the size and price class.
- 1000A peak output that cranks most 4, 6, and small 8 cylinder engines
- Compact lithium pack you can hold in one hand and stash in a glovebox
- Doubles as a 5V/2.1A USB power bank and 100 lumen LED flashlight
- Spark proof, reverse polarity protected, and safe for first time users
- Holds a usable charge for up to a year between top ups
Pros: Genuinely pocket sized yet strong enough for most daily drivers; Beginner friendly safety design removes the fear of clamping wrong; Built in flashlight and USB charging make it useful beyond jumps
Cons: 1000A ceiling means it can struggle with larger V8s and big diesels; Slow recharge time compared with higher tier units
Frequently Asked Questions
Can the NOCO GB40 start a V8 or a diesel truck?
It is rated for up to a 6L gasoline engine or a 3L diesel, so it handles most four, six, and small eight cylinder engines. For larger V8 trucks or big diesels you will want to size up to the GB70 or GB150 for the extra cranking amps.
How many jumps can the GB40 do on one charge?
Based on specs and verified owner reviews, a fully charged GB40 typically delivers around 20 jumps before it needs a recharge, depending on engine size and temperature. Owners report it holds a usable charge for up to a year, so it stays ready even after sitting in a glovebox.
Is the NOCO GB40 safe for beginners to use?
Yes, it is one of the most beginner friendly options because of its spark proof design and reverse polarity protection. The unit will not pass current if the clamps are connected backwards, which removes the most common and dangerous user mistake.
Our Verdict
The NOCO Boost Plus GB40 earns its reputation as a do it all pocket jump starter, blending a compact lithium design with strong 1000A output, foolproof safety, and bonus USB and flashlight functions. If you drive a typical four or six cylinder car and want a reliable booster that lives in your glovebox without hassle, it is an easy recommendation and one of our favorites in our roundup of the best jump starters. Owners of larger V8 trucks or sizable diesels should step up to the bigger sibling, and our NOCO GB40 vs GB70 comparison breaks down exactly when that extra power is worth it.
