#3 in Best Lithium Jump Starters (Portable)

NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper…

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Best for

Best with USB-C PD

Amazon rating

★★★★★4.6(15,014)

Amazon aggregate, one input among many in the Verdict Score

Verdict scoreGreat

83/ 100

Current price

$99.96

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Updated Jun 27, 2026 · 1 min read

The consensus

What reviewers found

Synthesized across the trust-weighted source mix below.

The NOCO Boost X GBX45 shows a 4.6-star average over roughly 15,000 verified-purchase reviews in the data we had. Its main distinguishing feature within NOCO's range is USB-C Power Delivery, which makes it more useful as a two-way power bank that recharges itself faster and can top up phones or laptops—handy if you want the device to earn its keep between emergencies. At 1250 peak amps (rated to 6.5L gas and 4.0L diesel) it sits a notch above the GB40 on capacity.

What reviewers liked

USB-C Power Delivery for faster self-recharge and device charging
Solid 4.6-star average across ~15,000 reviews
Slightly higher 1250A capacity than the entry GB40

Where it falls short

No independent expert or lab data appeared in our signals
Pricier than the GB40 for a modest capacity bump
Still not enough capacity for large diesel engines

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Across the reviews

Synthesis · not our verdict

At 1250 peak amps (rated to 6.5L gas and 4.0L diesel) it sits a notch above the GB40 on capacity. As with the other entries here, we had no independent lab tests or specialist-community threads in the signals, so this reflects buyer consensus rather than measured output. The rating is consistent across a substantial sample, which is what places it among the stronger picks.

Key specs

Source: Amazon listing

X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps for powerful starts on gas engines up to 6.5L and diesel engines up to 4.0L - built for extreme performance.

ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with enhanced thermal efficiency and power management for even safer operation and extended battery life.

TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery, or gain enough power for a jump start in just 5 minutes - even from a completely depleted battery.

60-SECOND TIMER — Integrated 60-second timer conserves power from its high-voltage design - delivering up to 6 jump starts per charge with extreme energy at every start.

CHARGE EVERYTHING — 60-watt USB-C Power Delivery lets you charge phones, tablets, laptops, and more. Dual-direction charging turns Boost X into a high-output portable power bank.

INTEGRATED LED FLASHLIGHT — Precision-engineered 100-lumen LED with 7 light modes, including SOS and strobe. Illuminate repairs, emergencies, or low-light environments.

WHAT’S IN THE BOX — GBX45 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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