VerdictAI
#2 in Best Lithium Jump Starters (Portable)

NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables…

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Best for

Best for everyday cars

Amazon rating

★★★★★4.6(127,576)

Amazon aggregate, one input among many in the Verdict Score

Verdict scoreGreat
86/ 100

Current price

$75.96

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Updated Jun 27, 2026 · 1 min read

NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables…

The consensus

What reviewers found

Synthesized across the trust-weighted source mix below.

The NOCO GB40 carries the deepest review base we saw anywhere in this category—on the order of 127,500 verified-purchase reviews averaging 4.6 stars. That volume is the single most informative thing in the data: a rating that holds up across that many buyers is a meaningful consistency signal, even though Amazon averages are gameable and we had no independent lab data to cross-check. At 1000 peak amps it's pitched at 6.0L gas and 3.0L diesel engines, which covers the bulk of everyday passenger cars without overpaying for capacity most drivers won't use.

What reviewers liked

  • Enormous verified-purchase review base (~127,500) at a solid 4.6-star average
  • 1000A is well-matched to typical four- and six-cylinder gas cars
  • Compact and widely available at a moderate price

Where it falls short

  • 1000A rating is limiting for large diesels, trucks and big SUVs
  • Evidence rests entirely on retailer ratings; no expert or community signals were present
  • Older-generation design lacks the USB-C PD of the newer Boost X line

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Across the reviews

Synthesis · not our verdict

The NOCO GB40 carries the deepest review base we saw anywhere in this category—on the order of 127,500 verified-purchase reviews averaging 4.6 stars. That volume is the single most informative thing in the data: a rating that holds up across that many buyers is a meaningful consistency signal, even though Amazon averages are gameable and we had no independent lab data to cross-check.

At 1000 peak amps it's pitched at 6.0L gas and 3.0L diesel engines, which covers the bulk of everyday passenger cars without overpaying for capacity most drivers won't use. Across the reviewers we read, it functions as the default recommendation for someone who wants a compact, no-frills emergency starter. Buyers needing to crank larger diesels or trucks should step up to the GB70 or GB150 instead.

Key specs

Source: Amazon listing
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.
ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse polarity protection for foolproof connections to any 12V vehicle - no sparks, no wrong connections.
PORTABLE POWER BANK — Integrated power bank delivers emergency power to smartphones, tablets, and more. Recharges in 3 hours so it’s ready when it matters most.
INTEGRATED LED FLASHLIGHT — Precision-engineered 100-lumen LED with 7 light modes, including SOS and strobe. Illuminate repairs, emergencies, or low-light environments.
COMPACT YET POWERFUL — High-discharge lithium technology delivers exceptional starting performance in a compact 2.5 lb form factor - perfectly sized for glove boxes and emergency kits.
BUILT TOUGH — Rugged IP65-rated housing with rubberized over-molding protects against water, dust, and impact. Includes high-conductivity clamps for maximum energy transfer.
WHAT’S IN THE BOX — GB40 jump starter, heavy-duty clamps, USB-C charging cable, and microfiber storage bag. Backed by a 1-year warranty and engineered in the USA.

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