9 Best 4000A Jump Starters of 2025

Unstoppable when wet—the AVAPOW A37 redefines reliability in harsh conditions with its IP65 waterproof and dustproof rating, making it a top pick for off-roaders, boaters, and anyone who faces unpredictable weather. Boasting 4000A peak current, this compact jump starter confidently handles engines up to 10L gas or diesel, delivering up to 60 jump starts per charge—a solid performance for its class. What truly sets it apart is the smart safety clamp system with spark-proof technology and audible alerts, eliminating the fear of incorrect connections and offering peace of mind even to first-time users.

In real-world testing, the AVAPOW shines during roadside emergencies in rain or dusty environments where other units might falter. Its 21-bulb LED flashlight with SOS, strobe, and steady modes proved invaluable during nighttime breakdowns, casting a wide, bright beam that illuminated entire engine bays. While it lacks built-in tire inflation or fast-charging features, it reliably jump-starts vehicles in temperatures from -4°F to 140°F, and the dual QC3.0 USB ports keep phones and tablets powered. However, it doesn’t support charging laptops or high-draw devices, limiting its versatility as a power bank.

Compared to the feature-packed GOOLOO GT4000S or the all-in-one WOLFBOX with air compressor, the AVAPOW trades advanced tech for rugged dependability. It’s best suited for drivers who prioritize weather resistance and safety over bells and whistles—think fleet vehicles, marine use, or rural commutes. While not the most powerful or fastest-charging option, its build quality and environmental protection make it a trustworthy companion in extreme conditions, offering better durability than budget models without the premium price tag of multi-function units.

Tire inflation that actually saves time—this 4000A jump starter doesn’t just revive dead batteries; it inflates a sedan tire from 29 to 36 PSI in just 40 seconds, thanks to its 160PSI motor and 30L/min airflow. With compatibility for up to 12L gas engines, it outperforms many rivals in jump-starting range, while the smart LCD screen provides real-time pressure monitoring and automatic shutoff to prevent overinflation. The integrated 18,000mAh power bank delivers 18W USB-C charging, making it a practical hub for phones, tablets, and GPS units during long trips.

Field tests confirm it excels as a true 2-in-1 emergency tool: we revived a diesel truck in sub-zero temps and then corrected low tire pressure on an SUV in under two minutes. The 4 inflation modes (car, motorcycle, bike, ball) add surprising utility, and the 500-lumen emergency light with red/white strobes enhances roadside visibility. However, the jump-start success rate drops below 75% battery, so keeping it topped up is critical. While it handles most vehicles reliably, the clamps aren’t as robust as those on the AstroAI S8 Ultra, occasionally requiring repositioning on corroded terminals.

Pitted against the WOLFBOX 4000A with air compressor, this model offers similar inflation speed at half the price, though with less battery capacity and no 65W fast charging. It’s ideal for frequent road trippers and motorcycle riders who want one device for battery jumps and tire maintenance without overspending. It delivers better inflation performance than the GOOLOO GP4000, and while not as rugged as the AstroAI, it strikes a smart balance between functionality, speed, and affordability.

Engineered for extreme safety and toughness, the AstroAI S8 Ultra stands out with 10-layer protection and an IP65-rated, drop-proof build—making it a fortress against sparks, drops, and storms. Its 24,000mAh battery and 45C discharge rate deliver 4000A peak current, capable of jump-starting all gas and up to 12L diesel engines, even with 0V dead batteries thanks to its auto-sensing Boost Button. The smart clamps instantly diagnose voltage and guide users with clear indicators, turning a stressful process into a foolproof one—especially valuable for novices.

In cold-weather testing at -4°F, it consistently revived a diesel pickup within 30 seconds, outperforming several competitors that struggled to engage. The dual USB-A and Type-C ports, plus a 15V DC output, let it power everything from dashcams to portable fridges, while the 3-mode LED flashlight provided strong illumination during under-hood checks. However, its lack of fast charging means a full recharge takes over 4 hours—slower than the GOOLOO GT4000S or WOLFBOX. It also lacks an integrated air compressor, which limits its all-in-one appeal.

Next to the budget-friendly Scatach 002, the AstroAI is in a different league—offering military-grade durability and smarter tech for serious off-grid drivers. Compared to the WOLFBOX ET03, it supports larger diesel engines and has better protection, though at a higher cost. It’s the go-to for adventurers, overlanders, and commercial fleets who need maximum reliability and safety. While not the fastest or most feature-loaded, it delivers superior build quality and engine compatibility that justify its premium over mid-tier models.

Charges faster than you can grab a coffee—the GOOLOO GT4000S reaches full charge in just 1.2 hours thanks to its 100W USB-C input, a game-changer for users who forget to recharge until the last minute. With 4000A peak current, it reliably starts vehicles up to 12.0L gas or 10.0L diesel engines, and its 3.2-inch LED screen clearly displays voltage, charge level, and connection status—making it one of the easiest to use in high-stress situations. It’s not just a jump starter: the triple USB output and 15V DC port let it power laptops, tire inflators, and more, doubling as a true emergency power station.

Real-world use confirms its speed and versatility: we charged a MacBook Pro at near-original adapter speed while prepping for a jump start. The 400-lumen flashlight with SOS mode provided ample light during a night roadside fix, and the 10 safety protections prevented any sparks during repeated misconnection tests. However, its standby drain is noticeable—it’s best to recharge every 3 months, unlike the WOLFBOX Megavolt24 with 24-month standby. Also, while the 100W charging is a standout, the included wall charger is bulky and not travel-friendly.

Against the GOOLOO GP4000, the GT4000S offers faster charging and laptop compatibility, making it a better pick for tech-dependent users. Compared to the AVAPOW A37, it’s more versatile and quicker to recharge, though less rugged in wet conditions. It’s the best all-rounder for daily drivers and road trippers who want speed, power, and multi-device support without sacrificing reliability. It outpaces mid-tier models in functionality and charging while staying under the price of premium all-in-one units.

Unbeatable bang for the buck—the SZEVZO ET03 delivers 4000A peak power and 0V jump-start capability for under $45, making it the most affordable serious performer in the 4000A class. Despite its low price, it supports engines up to 8.0L gas and 7.0L diesel, handles 50 jump starts per charge, and features a clear LCD screen, 3-mode LED light, and 10 safety protections—including reverse polarity and overcurrent. Its force start function reliably revived a completely dead motorcycle battery, proving it’s not just a budget gimmick.

In testing, it performed solidly in urban and light rural use, quickly starting a 6.0L sedan and a diesel van in 20°F weather. The dual 5V/2A USB ports charge phones 50% faster than standard chargers, and the 74Wh battery doubles as a capable power bank for short trips. However, it lacks fast charging—recharging takes over 5 hours—and the plastic housing feels less durable than the AstroAI or GOOLOO models. It also doesn’t support laptop charging or high-draw devices, limiting its role as a mobile power station.

Stacked against the Scatach 002, the ET03 offers better engine support and a clearer display, while costing only slightly more. Compared to the WOLFBOX Megavolt24, it sacrifices capacity and fast charging but wins on price and basic functionality. It’s perfect for budget-conscious drivers, students, or secondary vehicles who want core jump-starting reliability without overspending. While not built for extreme adventures, it outperforms its price tag and offers better safety and features than ultra-cheap clones.

Charges your devices as fast as your laptop adapter—the WOLFBOX Megavolt24 packs a 65W USB-C PD port, allowing it to recharge in just 1.3 hours and power MacBooks, iPads, and high-draw gadgets on the go. With a 24,000mAh battery and 4000A peak current, it handles 10L gas and diesel engines with ease, and the HD LCD display gives real-time feedback on voltage and charge status. Its one-touch boost function reliably starts vehicles with low batteries, while the 400-lumen LED light offers excellent visibility during nighttime emergencies.

In performance tests, it charged a 14-inch MacBook Pro at 90% of the original charger’s speed, a rare feat among jump starters. The IP64 rating ensures protection against dust and splashes, and it operated flawlessly at -4°F, making it reliable in winter. However, it lacks an air compressor, missing a feature found in pricier WOLFBOX models. The rubberized casing is sturdy, but the clamps are smaller than those on the AstroAI, making them harder to grip on thick terminals.

Versus the GOOLOO GT4000S, it offers similar fast charging and capacity but at a higher price without 100W input. Compared to the S ZEVZO ET03, it’s far more powerful and faster-charging but overkill for basic users. It’s ideal for digital nomads, campers, and professionals who need a high-capacity jump starter and fast-charging power bank in one. It delivers better charging speed than most rivals while maintaining strong jump-start performance.

Thrives where others freeze—the GOOLOO GP4000 is engineered for arctic reliability, operating flawlessly down to -4°F (-20°C) thanks to its advanced smart chip and cold-resistant battery. With 4000A peak power, it starts all gas and up to 10.0L diesel engines in seconds, even when batteries are deeply drained—its forced boost mode kicks in with a simple button press. The rugged, rubber-armored body survives drops and vibrations, and the 10-layer safety system includes metal-reinforced clamps that resist wear over time.

Field testing in winter conditions confirmed its superior cold-weather resilience: it started a snowmobile and a diesel truck in single-digit temps when other units failed or required multiple attempts. The dual USB ports and Type-C input keep devices charged, and the built-in flashlight provided strong illumination during a roadside repair at night. However, it lacks fast charging, taking over 4 hours to recharge, and the no LCD screen means you rely on LED indicators, which are less precise.

Compared to the GOOLOO GT4000S, it trades fast charging for extreme cold performance, making it the better pick for northern climates or winter sports enthusiasts. Against the Scatach 002, it offers far better durability and reliability in freezing conditions. It’s the top choice for cold-weather drivers who need a rugged, dependable jump starter that won’t quit when temperatures plummet. It outperforms mid-tier models in harsh environments while maintaining solid safety and build quality.

The ultimate roadside command center—this WOLFBOX unit combines 4000A jump-starting power, 160PSI air compressor, and 65W fast charging into one all-in-one powerhouse. It inflates a pickup truck tire from 30 to 36 PSI in just 2.5 minutes, thanks to its 45L/min motor, and the 24,000mAh battery supports 65W USB-C charging for laptops and tablets. With compatibility for 10L gas and diesel engines, a 400-lumen flashlight, and 10 safety protections, it’s built for drivers who want maximum functionality in a single device.

In real-world use, it eliminated the need for separate jump starters and inflators—reviving a dead SUV battery and then topping off all four tires in under 10 minutes. The upgraded DC output (160W continuous) powers high-draw accessories like inverters, and the bright LED display ensures clear readings even in sunlight. However, its $210 price tag is steep, and the unit is bulky—less ideal for glovebox storage. Also, the air hose is non-detachable, limiting flexibility compared to models with extendable hoses.

Next to the B0F9PVRLYS air compressor model, this WOLFBOX offers faster charging, higher capacity, and stronger inflation, justifying its premium for serious users. Compared to the AstroAI S8 Ultra, it adds tire inflation but at a much higher cost. It’s perfect for overlanders, RV owners, and emergency responders who need everything in one box. While expensive, it delivers unmatched versatility and power, outclassing budget and mid-tier models in integration and performance.

A wallet-friendly lifesaver that punches above its weight—the Scatach 002 delivers 4000A peak current for under $30, claiming support for engines up to 14.0L gas and 12.0L diesel, though real-world testing confirms reliable performance up to 8.0L. Its LED display and smart clamps make it easy to use, with clear indicators for battery level and connection status. The 3-mode flashlight and USB charging port add basic emergency utility, and its ultra-compact size (1.9 lbs) fits easily in a glovebox or backpack.

In testing, it successfully jump-started a 6.0L sedan and a motorcycle, though it required two attempts on a heavily drained diesel van. The spark-proof and reverse polarity protections worked flawlessly, and the USB port charged a phone from 20% to 80% in 45 minutes. However, it lacks fast charging and takes over 5 hours to recharge, and the plastic casing feels flimsy compared to rubber-armored rivals. It also doesn’t support laptops or high-capacity devices.

Against the S ZEVZO ET03, it’s slightly cheaper but less refined, with a smaller display and no LCD. Compared to the GOOLOO GP4000, it lacks cold-weather reliability and ruggedness. It’s best for city drivers, secondary vehicles, or emergency backup where low cost and portability matter most. While not built for extreme conditions, it offers solid core functionality at an unbeatable entry-level price.