The Best Portable Jump Starters

It recharges fast enough that you'll actually keep it topped off. Most jump starters die in a drawer because refilling them is a chore. The GBX55 takes about 1.2 hours over USB-C Power Delivery — roughly the time it takes to watch a movie. Better still, five minutes of charge from a completely flat pack gets you one jump. If you discover a dead unit at the worst possible moment, plugging it into your car's USB-C port buys you a start.

The safety design means you can't really get it wrong. NOCO's UltraSafe 2.0 blocks current entirely if you reverse the clamps. No sparks, no blown fuses, no fried electronics. If you've only jumped a car a couple of times and get nervous about which clamp goes where, this removes the anxiety. Published reviews have long credited NOCO's UltraSafe units with starting vehicles at 0 volts, where plenty of rivals refuse to wake up below 2 volts.

The engine coverage lines up with what most people actually drive. At 1,750 amps it's rated for gas engines up to 7.5L, which covers essentially every sedan, crossover and half-ton pickup on the road. Diesel coverage runs to 5.0L. If your driveway holds a Camry, a CR-V, an F-150 or a Grand Cherokee, you're well inside spec, with headroom for the cold mornings when your battery is weaker than usual.

It doubles as a genuinely useful power bank and light. The 60-watt USB-C port charges phones, tablets and most laptops, and it works both directions, so the same cable that fills the pack empties it into your devices. The 200-lumen LED has seven modes including SOS and strobe. On a dark shoulder with a flat tire, that light is worth as much as the jump.

Flaws but not dealbreakers

You get LED dots, not a screen. A row of indicator lights tells you roughly how much charge is left, and that's it — no voltage reading, no error codes, no percentage. The Hulkman Alpha85 costs about the same and gives you a real display. If you like knowing exactly what's happening, this will nag at you.

Diesel owners hit the ceiling sooner than they expect. 5.0L is the diesel limit, which rules out the 6.7L Cummins and Power Stroke trucks that need a jump starter most. The GB70 handles those. Check your displacement before you assume the bigger amp number covers you.

Nine starts per charge isn't a lot on paper. The 60-second timer conserves power by design, but it means fewer starts per charge than a bigger pack. For one car and the occasional emergency, that's plenty. For a fleet or a driveway full of neglected project cars, it isn't.

NOCO covers most of its units with a one-year warranty.

A thousand amps covers the car you probably drive. Four-cylinders, V6s and small V8s up to 6.0L are all inside spec. That's a Camry, a CR-V, an Escape, a Civic, a RAV4 — the vast majority of what's parked in American driveways. If you don't tow and you don't own a diesel, buying more amps than this mostly buys you weight.

It's the one you'll actually keep in the car. At about 2.4 pounds and roughly the size of a paperback, it slides into a glove box or a saddlebag and stays there. The IP65-rated housing with rubber over-molding shrugs off dust, rain and getting knocked around under a seat. A jump starter you leave in the garage helps nobody.

The safety engineering is the same as the expensive NOCOs. Patented spark-proof clamps and reverse polarity protection are standard here, not a premium upgrade. Published long-term testing has found the GB40 starting vehicles with batteries flat at 0 volts, while competing budget units wouldn't activate below 2 volts. That's the single biggest difference between a cheap pack that works and one that doesn't.

Twenty starts per charge is more than you'll ever need in one trip. Realistically you'll use one. But the headroom means a weak battery you're nursing through a cold week won't strand you, and the built-in power bank keeps a phone alive while you wait for a tow if things go worse than expected.

Flaws but not dealbreakers

It runs out of engine before you'd like. Above 6.0L gas or 3.0L diesel, this isn't your unit. Owners who buy it for a big truck and then try it on a genuinely dead battery in the cold are the ones who come away disappointed. Match the rating to the engine, not to the price.

Three hours to recharge feels slow now. The GBX55 does it in about 1.2 hours over USB-C. Three hours is fine if you charge it overnight twice a year, which is what you should be doing anyway. It's only a problem if you drain it and need it again the same afternoon.

No display, and the LED readout is coarse. You get a rough sense of remaining charge and nothing else. There's no voltage reading to tell you whether your battery is actually the problem.

NOCO covers most of its units with a one-year warranty.

It covers the trucks the GBX55 can't. Gas engines to 8.0L and diesels to 6.0L means the F-150 5.0L, the RAM 1500 HEMI and the Silverado 6.2L are all comfortably inside spec. If you tow, plow or park outside all winter, that margin is the point. Cold batteries pull far more current, and a unit rated right at your engine's limit is a unit rated too low.

Forty starts per charge means you can help other people. If you're the person in your family or on your street who gets the call when someone's car won't start, this holds enough charge to be useful repeatedly. The 400-lumen light is the brightest of the NOCOs here, which matters when you're crouched over someone else's engine bay after dark.

The same foolproof clamps, in a tougher body. Spark-proof connections and reverse polarity protection carry over from the rest of the NOCO line, wrapped in an IP65-rated housing with rubberized over-molding. At about five pounds it's still a one-hand carry, and it survives living in a truck bed toolbox better than a bare lithium brick would.

It's still a power bank when nothing's broken. The integrated USB output charges phones and tablets on job sites and campsites. That's the quiet argument for keeping it charged: you'll use it for something other than emergencies, so you'll notice when it's low.

Flaws but not dealbreakers

Six hours to recharge is the slowest here. If you use it and forget to plug it in, it's not ready for tomorrow. This is a unit that rewards a habit — plug it in the night you use it, every time.

It's the pricier NOCO and it still has no screen. You're paying for amps and start count, not information. For similar money the Hulkman Alpha85 gives you voltage readings and error codes on a real display.

Heavy-duty diesel owners are still out of luck. 6.0L is the ceiling, so a 6.7L Cummins or Power Stroke sits just outside it. The AVAPOW covers those on paper, with the caveats we get into below.

NOCO covers most of its units with a one-year warranty.

The display fixes the one thing every other pack here gets wrong. A 3.3-inch screen shows charge percentage, battery voltage and status codes. When a jump doesn't take, you learn whether the pack is low, the connection is bad or the vehicle battery is beyond help. Every other unit here leaves you staring at colored dots and guessing.

Sixty starts per charge is the most in this group. If you manage a small fleet, run a detailing shop or just own several cars that sit for weeks, that operational range is genuinely useful. It's fifty percent more than the GB70 and roughly six times the GBX55, and it means you're not rationing a pack during a cold snap.

It charges quickly and then holds it for a long time. 65-watt charging takes it from empty to 80 percent in about an hour and full in 90 minutes. Once full, it's rated to hold charge for up to 18 months. For a device that spends its life waiting, that shelf life is arguably more valuable than the amp rating.

Coverage runs to 8.5L gas and 6.0L diesel, the broadest gas figure here. Ten layers of protection include spark-proof and reverse-polarity safeguards with intelligent clamps. It also puts out 15V DC, so it can run a tire pump or a car fridge — handy on a camping trip where the nearest outlet is an hour away.

Flaws but not dealbreakers

Hulkman doesn't have the track record NOCO or Clore do. It's a newer name in a category where the thing you're buying is reliability after two years of neglect in a hot trunk. Owner feedback skews positive, but the long tail of evidence just isn't as deep.

It's bigger and heavier than the NOCO it competes with. At about 4.5 pounds and roughly nine inches long, it's a center-console or trunk item rather than a glove-box one. The screen is part of why.

USB-C output tops out at 18W. That's fine for a phone, slow for a tablet and not enough to meaningfully charge a laptop. The GBX55's 60-watt port is in a different league if you care about using this as a power bank.

Lead-acid keeps working when lithium gets sluggish. Published cold-weather comparisons find lithium packs delivering meaningfully fewer successful starts once temperatures fall toward 20°F, while lead-acid units of this class hold consistent output down to about -20°F. If you live somewhere winter is a real adversary rather than an inconvenience, that difference decides the purchase.

The 46-inch cables reach where the little packs can't. Most lithium units give you 26 to 30 inches, which assumes you can set the pack right beside the battery. Try that on a car with the battery in the trunk, or on a vehicle you can't quite park next to. Heavy #2 AWG cable also loses less voltage over the run, which is exactly what you want when the battery is completely flat.

The voltmeter tells you where you stand before you connect anything. A dial on the unit shows the internal battery's charge status. There's no percentage to interpret and no app — you glance at it and know whether it's ready. For a device that lives on a shelf for months, that's the right kind of simple.

It's built for repetition rather than convenience. The 22Ah Clore Proformer battery is designed specifically for jump starting, and this is the unit that shows up in professional shops that jump cars all day. A DC outlet on the side runs 12V accessories. Nothing here is clever. All of it is durable.

Flaws but not dealbreakers

It weighs about 18 pounds and takes up real trunk space. This isn't a glove-box tool. It's a thing you carry with a handle, and if your priority is something you can forget about in a console, buy a lithium pack instead.

No USB, no power bank, no charging your phone. It jumps cars. That's the entire feature list, plus a 12V accessory outlet.

It demands maintenance you have to remember. Lead-acid needs regular topping off to stay ready, and a JNC660 left uncharged for a season won't do you much good. If you know yourself well enough to doubt you'll keep up, that's an honest reason to pick something else.