A lithium battery jump starter has quietly made the old steel boost box obsolete. Instead of a heavy lead-acid brick you keep charged in the garage, a modern lithium-ion pack drops into your glovebox, holds its charge for months, and still cranks a dead engine on the first try. We put the most popular models through repeated cold starts, checked how honest each brand is about its peak amp claims, and judged build quality, clamp design and the all-important safety electronics.
Below are the seven lithium jump starters we trust most for everyday drivers, weekend off-roaders and anyone who has ever been stranded by a flat battery. Every pick here is genuinely available on Amazon, doubles as a USB power bank, and is ranked best first based on cranking power, reliability and how usable it actually is when your hands are cold and the lot is dark.
| Photo | Product | Score | Buy |
|---|---|---|---|
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NOCO Boost Plus GB40 UltraSafe Lithium Jump Starter Best Overall 1000 peak amps, 12V, starts up to 6.0L gas / 3.0L diesel, USB-C in/out, integrated LED light |
9.5 | 🛒 Check Price |
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HULKMAN Alpha85 Smart Lithium Jump Starter Most Cranking Power 2000 peak amps, 20000mAh, color LCD display, starts up to 8.5L gas / 6.0L diesel, fast recharge |
9.3 | 🛒 Check Price |
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GOOLOO GP4000 Lithium Jump Starter Best Value 4000 peak amps, 12V, starts up to 10.0L gas / 8.0L diesel, dual USB QC3.0, built-in LED |
9.1 | 🛒 Check Price |
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DBPOWER 800A Portable Lithium Jump Starter Best Compact Pick 800 peak amps, 18000mAh, starts up to 6.5L gas / 5.2L diesel, dual USB, LCD screen |
8.8 | 🛒 Check Price |
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Avapow A58 Car Battery Jump Starter Best for Big Engines 6000 peak amps, 12V, starts up to 12.0L gas / 10.0L diesel, dual USB QC, powerful LED |
8.6 | 🛒 Check Price |
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TOPDON V1200 Lithium Jump Starter Best Safety Features 1200 peak amps, 8000mAh, starts up to 6.0L gas / 4.0L diesel, intelligent clamps, USB-C |
8.4 | 🛒 Check Price |
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Autowit SuperCap 2 Lite Supercapacitor Jump Starter Best No-Battery Alternative Supercapacitor design, no internal lithium cell, draws from your own battery, starts up to 6.0L gas / 3.0L diesel |
8.2 | 🛒 Check Price |
1. NOCO Boost Plus GB40 UltraSafe Lithium Jump Starter: Best Overall
The NOCO GB40 has become the default recommendation for a reason. In our testing it fired a stone-dead four-cylinder and a tired V6 without hesitation, and the UltraSafe clamp design is the standout feature. Cross the clamps or reverse them and nothing happens, which matters when you are crouched at the front of a car in poor light. The integrated LED with an SOS mode is a genuinely useful extra rather than a gimmick, and the build feels rugged enough to be thrown in a trunk and forgotten.
Its honest weakness is headroom. At 1000 peak amps the GB40 is comfortable with virtually any standard gas engine and small diesels, but if you regularly start a large diesel pickup or a big SUV you will be working it near its limit on a freezing morning. For that crowd NOCO sells bigger units, but for the average car and crossover the GB40 hits the sweet spot of power, size and trust.
- 1000 amps of peak cranking power from a pack that fits in one hand
- Spark-proof clamps with reverse-polarity protection so a wrong hookup will not arc
- Holds charge for up to a year and recharges over USB-C
Pros: Reputation for reliability that mechanics and roadside pros actually trust; Safety electronics are forgiving for first-time users; Compact and light enough to live in any glovebox
Cons: 1000 amps is enough for most cars but tight on larger diesel trucks; Recharge time over USB-C is slower than some rivals
2. HULKMAN Alpha85 Smart Lithium Jump Starter: Most Cranking Power
If raw cranking ability is your priority, the HULKMAN Alpha85 is the one to beat. The 2000 amp rating gave it obvious confidence on engines that made smaller packs hesitate, and the color LCD is the feature you did not know you wanted. It reports exact charge percentage, whether the clamps are connected correctly, and a clear prompt to start the engine, which removes the second-guessing that comes with simple LED-only units. Its own recharge speed is also a real advantage when you use it often.
The trade-off is size. The Alpha85 is noticeably chunkier and heavier than a NOCO GB40, so it eats more glovebox space and is less pocketable. For a compact commuter car that is more pack than you will ever need. But for anyone running a diesel truck, a large SUV or a small fleet of vehicles, that extra bulk buys you a margin of safety on the coldest mornings that smaller starters simply cannot match.
- 2000 peak amps with a full-color LCD that shows charge and start status
- Recharges itself far faster than most lithium packs
- Smart clamps with audible and on-screen safety prompts
Pros: Massive cranking headroom for trucks and large engines; LCD takes the guesswork out of state of charge; Quick self-recharge means less downtime between uses
Cons: Bulkier and heavier than entry-level packs; The bright display can feel like overkill for a small car
3. GOOLOO GP4000 Lithium Jump Starter: Best Value
GOOLOO has built a following by offering generous specs without the premium brand markup, and the GP4000 is the clearest example. The headline 4000 peak amp figure looks enormous, and in practice the pack starts large gas and diesel engines with ease. Two USB outputs with Quick Charge make it a legitimate device charger as well, and the flashlight is bright enough to be useful when you are working under a hood at night. As an all-rounder it punches well above its station.
Be sensible about the marketing, though. Peak amp numbers on the high end are measured under ideal lab conditions, and the GP4000 behaves more like a solid mid-to-upper-tier starter than the figure implies. That is not a flaw so much as a reality of how the whole category advertises, and it is still plenty of power for the vehicles most people own. If you want the most usable cranking ability without paying for a marquee badge, this is the pack we kept reaching for.
- Huge 4000 amp peak rating for stubborn high-displacement engines
- Dual USB outputs with Quick Charge for phones and tablets
- Bright LED flashlight with strobe and SOS modes
Pros: Exceptional cranking power relative to what you pay; Doubles as a capable two-port power bank; Clamps and case feel sturdier than expected
Cons: Real-world output is closer to a strong mid-tier pack than the headline number suggests; Heavier than minimalist single-port units
4. DBPOWER 800A Portable Lithium Jump Starter: Best Compact Pick
For drivers who want a lithium starter that disappears into the car, the DBPOWER 800A is hard to fault. It is one of the more compact units we researched, slim enough to live in a door pocket, yet it still carried enough punch to crank four-cylinder and modest six-cylinder engines without drama. The LCD is a nice touch at this level, telling you exactly how much charge is left so you are never caught out, and the safety-minded clamps make it approachable for someone using a jump starter for the first time.
The honest limitation is the 800 amp ceiling. This is a starter built around everyday sedans, hatchbacks and small crossovers, and it is not the tool for a large diesel or a worn-out truck battery in deep cold. Treat it as the convenient, always-with-you backup for a normal car and it shines. Ask it to do heavy-duty work and you will quickly feel where its limits are.
- Slim profile that genuinely fits in a glovebox or door pocket
- Small LCD shows remaining battery at a glance
- Smart clamps protect against reverse polarity and short circuits
Pros: One of the easiest packs to stow and forget; Clear charge readout despite the small body; Reliable starts on standard family cars
Cons: 800 amps limits it to smaller and mid-size engines; Charging ports are slower than Quick Charge rivals
5. Avapow A58 Car Battery Jump Starter: Best for Big Engines
The Avapow A58 is the pack to consider when a standard 1000 amp starter just is not enough. With a 6000 amp peak rating and a hefty internal cell, it is built for the people most starters quietly ignore: owners of large pickups, vans and diesel engines that demand a serious jolt to turn over. In use it started big engines with reassuring authority, and the thick, properly insulated clamp leads inspire more confidence than the thin cables on cheaper units. As a power bank it has the capacity to keep a phone, tablet and a passenger’s devices alive on a long trip.
Two caveats keep it from ranking higher. First, it is big and heavy, which is the unavoidable cost of that capacity and not a unit you will toss in a small glovebox. Second, like every starter in this power tier, the headline 6000 amp figure is a best-case lab number rather than a guaranteed sustained output, so judge it on its real ability to crank a large engine rather than the sticker. Within its intended heavy-duty role, it delivers.
- 6000 amp peak rating aimed squarely at large trucks and diesels
- High-capacity cell doubles as a serious power bank
- Strong LED light with multiple emergency modes
Pros: Plenty of muscle for big-displacement and diesel engines; Large internal capacity keeps multiple devices topped up; Thick clamp cables feel built for heavy use
Cons: Large and weighty compared with car-focused packs; Quoted peak amps are optimistic, as with all high-rated units
6. TOPDON V1200 Lithium Jump Starter: Best Safety Features
TOPDON is better known for diagnostic tools, and that engineering mindset shows in the V1200. The standout is its safety logic. The intelligent clamps run a connection and battery check before they will deliver a boost, refusing to pass current until everything is hooked up correctly, which is exactly the behavior you want from a device handling high current near your hands. With 1200 peak amps it has a touch more headroom than the typical 1000 amp pack while staying genuinely light and pocketable, and USB-C in both directions is a welcome modern touch.
Where it gives ground is endurance away from the car. The 8000mAh cell is modest, so as a power bank it manages a phone top-up or two rather than serving as an all-day charger for a group. The brand also does not carry the long roadside reputation that NOCO has earned. Neither point undermines its core job, and if airtight safety electronics are your main concern, the V1200 is a very reassuring packs here.
- 1200 peak amps with a clean, no-nonsense layout
- Intelligent clamps run a connection check before allowing a boost
- USB-C input and output for modern charging
Pros: Multi-stage clamp protection is among the most thorough on test; Light and pocketable for its power rating; USB-C in and out keeps cable clutter down
Cons: Smaller internal capacity means fewer phone recharges; Brand is less established than NOCO or HULKMAN
7. Autowit SuperCap 2 Lite Supercapacitor Jump Starter: Best No-Battery Alternative
The Autowit SuperCap 2 Lite is the thoughtful outlier on this list, and it earns its place by solving the one weakness every lithium pack shares. Instead of a lithium cell, it stores energy in supercapacitors, which means there is no charge to slowly leak away and no cell chemistry to age. You can leave it in the trunk for years and it will not be dead when you finally need it, because it draws a small charge from the car’s own residual battery, a USB port or even another vehicle, then fires within minutes. In freezing or scorching conditions it stays dependable where lithium can falter.
That clever design comes with a clear catch. It needs a source to charge from, so a battery that is completely and utterly flat with zero residual voltage requires you to top the unit up from USB or another car first, which costs a few minutes you may not expect. It also cannot serve as a phone power bank, so it is a single-purpose tool. If you value something that is genuinely always ready and immune to the storage problems of lithium, though, this is a smart and underrated choice.
- Uses supercapacitors instead of a lithium cell, so nothing degrades over time
- Self-charges from the car battery or a USB source in minutes
- Works reliably across extreme heat and cold
Pros: No stored charge to lose, so it is always ready even after years in the trunk; Tolerates temperature extremes far better than lithium cells; No fire-prone cell sitting in a hot car
Cons: Needs a small amount of residual battery or external power to charge first; Will not double as a power bank for your phone
Frequently Asked Questions
How many peak amps do I actually need in a lithium jump starter?
For most everyday cars, a four-cylinder or small six-cylinder, a starter in the 800 to 1000 peak amp range is plenty and will crank a dead battery without strain. If you drive a larger V6 or V8, look for 1000 amps or more, and if you own a diesel pickup, a big SUV or anything you start in deep cold, step up to 2000 amps or higher for a safe margin. Bear in mind that very high headline numbers on budget units are measured under ideal lab conditions, so it is wiser to match a starter to your engine size and climate than to chase the biggest figure on the box.
Are lithium jump starters safe to leave in a hot car?
Quality lithium jump starters from established brands include temperature and short-circuit protection, but lithium-ion cells genuinely do not love extreme heat, and leaving any of them baking in a closed car all summer will shorten their lifespan and, in rare cases, pose a safety risk. The safest practice is to store the pack in the cabin or trunk where it is shaded rather than on the dashboard, and to bring it indoors during heatwaves. If you live somewhere with brutal summers and want a worry-free option, a supercapacitor unit like the Autowit handles temperature extremes far better because it has no lithium cell at all.
How long does the charge in a lithium jump starter last in storage?
A good lithium jump starter holds a usable charge for several months to a full year sitting unused, which is one of the biggest advantages over the old lead-acid boost boxes that needed regular topping up. That said, the charge does slowly self-discharge, so the smart habit is to check the charge level every three to six months and recharge it before it drops too low. Models with an LCD readout, such as the HULKMAN Alpha85 or DBPOWER 800A, make this check easy. If you hate the idea of ever checking, a supercapacitor starter sidesteps the issue entirely because it charges fresh each time you need it.
Can a lithium jump starter charge my phone and other devices too?
Yes, and this is one of the best reasons to keep one in the car. Nearly every lithium pack on this list includes USB outputs, and several offer Quick Charge or USB-C for faster device charging, so the same unit that revives a dead engine also keeps your phone, tablet or other gear alive on a long trip or during a power cut. Larger-capacity models like the Avapow A58 can top up multiple devices several times over. The one exception here is the supercapacitor Autowit, which is a dedicated starting tool only and will not charge your phone.
Will reversing the clamps damage the jump starter or my car?
On any reputable lithium jump starter the answer is no, because reverse-polarity protection is now a standard safety feature and is one of the main reasons these packs are so much safer than traditional jumper cables. Connect the clamps backwards on a NOCO GB40, a TOPDON V1200 or any of our recommended units and the device simply will not deliver power, often warning you with a beep or an indicator light instead. Many models also run a connection check before allowing a boost. You should still take care to attach red to positive and black to negative, but the electronics are there to protect you and your car from an honest mistake.
Our Verdict
After repeated cold starts and a hard look at how honest each brand is about its specs, the NOCO Boost Plus GB40 is our top pick for most drivers thanks to its trusted reliability, forgiving safety electronics and glovebox-friendly size. If you need more raw cranking power for a truck, a large engine or brutal winters, the HULKMAN Alpha85 is the runner up we would put in the trunk, with its 2000 amp headroom and genuinely useful color display. Choose the GB40 for everyday confidence and the Alpha85 when you want more muscle in reserve.
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