Best Portable Jump Starters
Lithium jump starters that actually crank a dead battery — sized by real amps, not marketing amps.
The high-amp budget option: 4000A peak rated for all gas engines and diesels up to 10.0L, with SuperSafe clamp protection and a big enough cell to work as a dual-USB power bank. Note this is the GP model — GOOLOO's pricier GT4000S is the one with 100W two-way USB-C, which this does not have.
The value pick for people who want the pack to double as a laptop/phone bank: 2000A of starting power — enough for a big V8 — plus 65W USB-C PD that charges in and out. The 3.3-inch screen reports exact charge and fault state rather than making you guess at LED bars.
The headroom option for big trucks and diesels: AVAPOW rates the A68 at 6000A peak and up to a 12L diesel, with an eight-layer clamp protection system and indicator lights that make a wrong connection hard to complete. It also works as a dual-USB power bank with a 3-mode LED light. Overkill for a commuter car, right-sized if you regularly start large diesel powerplants.
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Best Overall is an editorial pick, chosen for the job most buyers in this category are actually doing. DriveScore is a published supporting signal, not the tiebreaker — a cheaper, narrower product can out-score the pick and still be the wrong buy. How we rank.
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Best overall is our editorial pick; the rest are derived from the published sub-scores.
Our editorial pick — the best fit for what most buyers in this category need. The value pick for people who want the pack to double as a laptop/phone bank: 2000A of starting power — enough for a big V8 — plus 65W USB-C PD that charges in and out. The 3.3-inch screen reports exact charge and fault state rather than making you guess at LED bars.
All 3, ranked — deltas vs. the winner
EDITORIAL RANK · DRIVESCORE SHOWNHow to actually pick one
The number on the box is almost always 'peak amps,' a meaningless instantaneous spec. What starts your car is sustained cranking current, which reputable brands rarely print. For a 4-cylinder, a 400–800A-class pack is plenty; for a V6/V8, step up to 1000A+; for a diesel, buy a unit that explicitly lists diesel displacement support. Prioritize spark-proof, reverse-polarity-protected clamps — the safety electronics are where cheap units cut corners. Capacity (mAh) matters mostly for how many starts per charge and USB-C PD output for phones/laptops. Store it charged; lithium packs self-discharge and a dead jump starter is useless in an emergency.