Dead car batteries are an inevitable hassle, often striking at the most inconvenient times. Whether it’s a frigid winter morning or a sweltering summer afternoon, a powerless vehicle can disrupt your schedule and leave you stranded. Fortunately, the Best Portable Car Battery Jump Starters offer a swift and reliable solution, empowering you to revive your vehicle and get back on the road without waiting for assistance. We’ve rigorously tested a range of jump starters, from compact lithium-ion models to robust sealed lead-acid units, to bring you our top recommendations for the best portable car battery jump starters available today.
Hulkman Alpha85S
OVERALL SCORE
77
- Power Performance 9.0
- Battery Storage 7.0
- Craftsmanship & Durability 7.0
- Ease of Use 8.0
- Versatility 6.0
REASONS TO BUY
- Clear digital battery display
- Exceptional power output for reliable jump starts
- Extended battery life for multiple uses
- Comprehensive accessory kit included
REASONS TO AVOID
- No included carrying case for organization
- Larger size compared to other lithium-ion jump starters
- Higher price point
For those who demand peak performance and a suite of features in a sophisticated package, the HULKMAN Alpha85S stands out as a top contender. Our expert testing revealed its superior power delivery, with our lead tester noting, “During our power assessment, this model produced a higher voltage than any other jump starter in our review.” Beyond raw power, the Alpha85S excels in battery longevity and charging speed. The digital display provides precise battery percentage readings, eliminating guesswork common with LED meters. Its integrated flashlight is notably bright, and the design is conveniently slim enough to store under a seat or in a door panel. The Alpha85S offers versatile charging options, accepting power via USB or the included 12-volt car outlet adapter, and it can conversely charge USB and 12-volt devices.
SPECIFICATIONS
| Feature | Specification |
|---|---|
| Peak Amps | 2000 |
| Starting Amps | 500 |
| Watt Hours | 74 |
| Number of Jump Starts | 60 |
| Number of Cell Phone Charges | 20 |
Despite its premium features, the HULKMAN Alpha85S surprisingly lacks a dedicated case to organize its numerous cords and adapters. It’s also physically larger than many lithium-ion jump starters in its class, though still more compact than traditional sealed lead-acid models. As one tester pointed out, “It is notably smaller than any sealed lead acid battery model, but other lithium-ion jump starters are compact enough to fit in a center console or a glove box.” The Alpha85S comes with a higher price tag, reflecting its advanced capabilities. However, for those prioritizing top-tier performance and cutting-edge technology, the Alpha85S is the ultimate choice. For a more budget-friendly and compact alternative, consider the NOCO Boost Plus GB40, which offers solid lithium-ion performance in a smaller package, including a Boost mode for immediate jump-starting power.
The HULKMAN Alpha85S offers our favorite kit in the lithium-ion portable car battery jump starter category.
Credit: Ross Patton
Best Value Portable Jump Starter
GOOLOO GP2000
OVERALL SCORE
63
- Power Performance 6.0
- Battery Storage 7.0
- Craftsmanship & Durability 6.0
- Ease of Use 6.0
- Versatility 5.0
REASONS TO BUY
- High-capacity battery for numerous charges
- Impressive 2000 peak amp rating for jump-starting
- 73 watt-hour battery for extended power
- USB and 12V DC accessory power outlets
REASONS TO AVOID
- Less effective on larger engines
- Bulky and less refined carrying case
- 12V AC car adapter sold separately
If maximizing portable power is your primary concern, and jump-starting is a secondary need, the GOOLOO GP2000 is a compelling option, boasting a high-capacity lithium-ion battery and a plethora of charging ports. This model packs a 37Wh lithium-ion battery, capable of delivering up to 2000 peak amps for jump-starting vehicles. One tester observed, “It wasn’t as powerful for boosting larger batteries on bigger trucks, but had plenty of juice to handle eight consecutive boosts on a 2.5-liter engine before needing another charge.” The GP2000 truly shines as a portable power bank, excelling at charging electronic devices via its USB ports. During testing, we successfully charged an iPhone up to 15 times on a single charge using the 5V USB port. The inclusion of a USB-C port for both input and output further enhances its charging versatility.
SPECIFICATIONS
| Feature | Specification |
|---|---|
| Peak Amps | 1,200 |
| Starting Amps | 500 |
| Watt Hours | 37 |
| Number of Jump Starts | 8 |
| Number of Cell Phone Charges | 3 |
While proficient at powering devices, the GOOLOO GP2000’s jump-starting prowess is somewhat less impressive. Our lead tester noted, “it is fully capable of bringing mid-size batteries back to life but doesn’t quite have the gusto to manage larger engines and higher cranking amps.” However, its substantial 37Wh battery capacity ensures it holds a charge for extended periods, making it ideal for keeping your devices powered on the go. The GOOLOO GP2000 offers a compelling blend of portable power and jump-starting capability at an attractive price point, delivering excellent value for money.
We utilized a multimeter to accurately measure the output power of these portable jump starters. The GOOLOO GP2000 effectively charges USB-powered devices, functioning like a standard 5V 2A wall charger.
Credit: Rob Woodworth
Best Compact Portable Jump Starter
NOCO Boost Plus GB40
OVERALL SCORE
67
- Power Performance 7.0
- Battery Storage 6.0
- Craftsmanship & Durability 8.0
- Ease of Use 6.0
- Versatility 5.0
REASONS TO BUY
- Highly compact and easily storable
- Lightweight design for portability
- Boost Mode for instant jump-starting power
- IP65 waterproof rating for weather resistance
REASONS TO AVOID
- No included wall plug for charging
- Not optimized for larger vehicle engines
- Moderate battery life requiring more frequent charging
- Limited feature set beyond jump-starting and USB charging
For drivers prioritizing minimal space intrusion or seeking an easily portable jump starter, the NOCO Boost Plus GB40 is our top recommendation for the best compact model. A team member remarked, “This powerful little device is tiny compared to much of the competition, yet it has proven to be able to start every vehicle we’ve tested it with.” Unlike many jump starters that require a waiting period, the GB40 features a ‘Boost Mode’ that delivers a rapid surge of power, enabling immediate vehicle starts in most situations. Its robust construction includes an IP65 waterproof rating, providing resilience against rain and dust. “Although you can’t exactly go swimming with it, a little bit of rainwater and dust is no problem,” one tester humorously noted.
SPECIFICATIONS
| Feature | Specification |
|---|---|
| Peak Amps | 1000 |
| Starting Amps | 500 |
| Watt Hours | 24 |
| Number of Jump Starts | 10 |
| Number of Cell Phone Charges | 4 |
The NOCO Boost Plus GB40 offers limited versatility, primarily functioning as a car battery jump starter and USB power source. Charging is exclusively via USB cable, and a wall adapter is not included. With 1000 peak amps, it’s not ideally suited for larger engines. Our lead tester cautioned, “But the smaller size equates to a shorter battery life, so if you go with this option, be sure to keep up on your intermittent charging.” Despite these limitations, the NOCO GB40 impresses with its overall performance, especially considering its remarkably compact size. If budget allows, the Hulkman Alpha85S offers a significant upgrade in battery capacity and features in the portable jump starter category.
If you prioritize a reliable portable car battery jump starter that remains discreetly stored in your vehicle, the compact NOCO GB40 is an excellent choice.
Credit: Ross Patton
Best Portable Jump Starter for Home or Shop Use
Dewalt DXAEJ14
OVERALL SCORE
60
- Power Performance 7.0
- Battery Storage 5.0
- Craftsmanship & Durability 6.0
- Ease of Use 5.0
- Versatility 8.0
REASONS TO BUY
- Exceptionally robust and durable construction for demanding environments
- Higher peak amp rating for reliable starting power
- Integrated 120 PSI air compressor with precise digital settings
- Versatile charging options: 12V DC and 120 AC
- Includes dual USB ports and a 12V 10A outlet for powering accessories
REASONS TO AVOID
- Heavy and less portable than lithium-ion models
- Limited storage for cables and accessories
- Not designed for consecutive jump starts without recharging
- Lower watt-hour battery compared to some competitors
For a comprehensive home or shop power solution, the Dewalt DXAEJ14 delivers a wide array of functionalities beyond jump-starting. Our lead tester highlighted its versatility, stating, “Need to air up your tires? Check your alternator? Charge your cell phone? The Dewalt proved useful even beyond jump-start testing.” The integrated 120 PSI air compressor with a digital LCD screen for setting desired pressure is a standout feature. In addition to providing 1400 peak amps, it can power accessories via dual USB ports and a 12V DC charging port. While not as lightweight as lithium-ion models, its robust power enables it to jump-start larger engines while still offering capacity for device charging or tire inflation.
SPECIFICATIONS
| Feature | Specification |
|---|---|
| Peak Amps | 1,400 |
| Starting Amps | 700 |
| Watt Hours | 21 |
| Number of Jump Starts | 2 |
| Number of Cell Phone Charges | 4 |
Unlike lithium-ion models capable of multiple jump starts per charge, the Dewalt DXAEJ14, being a sealed lead-acid (SLA) type, requires recharging after each jump. Regular monthly charging is recommended to maintain battery health. However, the Dewalt DXAEJ14 surpasses competitors in battery capacity within the SLA category, featuring a 21 amp-hour battery. One tester commented, “That power performance, coupled with its versatility (and its 35-pound weight), makes it a favorite for around-the-house and shop use.” For a more budget-conscious SLA jump starter with similar features like a USB port and 120 psi air compressor, the Stanley J5C09 1000 Peak Amp offers a viable alternative.
The Dewalt DXAEJ14 is our preferred sealed lead-acid portable car battery jump starter, particularly for its integrated air compressor.
Credit: Rob Woodworth
Product Comparison
Portable car battery jump starters are available in various sizes. Many top-rated models, such as the NOCO Boost HD, are surprisingly compact.
Credit: Eric Bissell
Our Testing Methodology for Portable Jump Starters
We rigorously test portable car battery jump starters with peak amp ratings ranging from 1000 to 2000 amps, encompassing both lithium-ion and sealed lead-acid battery technologies. Our testing protocol aims to determine the performance limits of each unit. We subject each jump starter to boosting batteries of varying sizes across a diverse fleet of vehicles, from a 650cc motorcycle to a 6.7L V8 diesel truck and a 454 horsepower inboard boat engine. We meticulously monitor voltage and current during jump starts and, when feasible, bypass the vehicle battery entirely to assess the number of cold starts each unit can achieve. All models undergo identical testing procedures and are scored based on the following five key metrics:
- Power Performance (30% of overall score): Evaluates the jump starter’s ability to deliver sufficient power for effective jump starts across different engine sizes.
- Battery Storage (30% of overall score): Assesses battery capacity, longevity, and the number of jump starts and device charges achievable per charge.
- Craftsmanship & Durability (20% of overall score): Examines build quality, robustness, weather resistance, and cable durability for long-term reliability.
- Ease of Use (15% of overall score): Evaluates the intuitiveness of operation, display clarity, connection simplicity, and overall user-friendliness.
- Versatility (15% of overall score): Assesses additional features such as USB charging, air compressors, work lights, and the overall utility beyond jump-starting.
Many models also include integrated flashlights, a valuable feature for nighttime emergencies.
The HULKMAN Alpha85S demonstrates sufficient power to operate a 12-volt compressor, showcasing its power output capabilities.
Portable jump starters offer a significantly simpler and faster alternative to traditional jumper cables.
Why Trust Our Portable Jump Starter Reviews?
Our portable jump starter reviews are conducted by experienced professionals. Ross Patton, a veteran team member and primary tester, possesses extensive experience in off-roading, overlanding, and battery-powered technologies. His Environmental Science background from the University of Nevada, Reno, combined with his passion for technical products and outdoor adventures, makes him ideally suited for evaluating these devices.
Rob Woodworth, another key tester, is a Coast Guard Certified Captain with deep knowledge of 12V systems and battery maintenance, particularly in marine and off-grid solar applications. His practical expertise in maintaining deep-cycle marine batteries and operating heavy equipment provides a nuanced understanding of battery performance beyond typical consumer use. The combined expertise of Ross and Rob ensures our portable jump starter reviews are thorough, in-depth, and based on rigorous testing and real-world experience.
Our testers conduct comprehensive examinations of portable jump starters, employing professional-grade voltmeters and load testers to measure performance metrics and USB charging port output.
Our testing process goes beyond basic usage; we subject each portable jump starter to a comprehensive series of exhaustive tests using professional-grade electronic voltage meters and load testers.
We meticulously compare adapter clips and other components of each portable jump starter during our detailed review process.
Choosing the Right Portable Jump Starter: Key Considerations
A high-quality portable jump starter is an invaluable tool for avoiding the inconvenience of a dead battery. While many models may appear similar at first glance, our detailed testing reveals critical differences that distinguish exceptional jump starters from mediocre ones. Before making a purchase, consider these essential factors to guide your decision:
Sealed Lead Acid (SLA) vs. Lithium-Ion (LI) Batteries
Both SLA and lithium-ion batteries offer advantages, catering to different needs. The primary difference lies in weight and size: SLA batteries are significantly heavier and bulkier than lithium-ion counterparts. Lithium-ion batteries generally provide higher power-to-weight ratios and greater energy density (watt-hours). SLA batteries are cost-effective, durable, and reliable, but require proper maintenance, including recharging after each jump start. Lithium-ion jump starters can typically perform multiple jump starts on a single charge and retain their charge longer in storage, while SLA batteries are prone to self-discharge over time.
Visually, lithium-ion batteries resemble sleek, modern power banks, while SLA options are characterized by their larger, boxier charging pack appearance. Our comparison chart specifications highlight the weight disparity: lithium-ion packs generally weigh under five pounds, whereas SLA packs often exceed 15 pounds.
Jump Start Frequency
Consider how frequently you anticipate needing to jump-start a vehicle. While manufacturers may list milliamp-hours (mAh) or amp-hours (Ah), watt-hours (Wh) is a more relevant metric for comparing battery storage capacity across different voltages. Our testing focuses on watt-hours to accurately reflect the number of jump starts and device charges you can expect from each unit before requiring a recharge. If frequent jump-starting is anticipated, prioritize models with higher watt-hour ratings for greater battery storage capacity. Our Battery Storage metric in the comparison chart provides this data.
Engine Size and Peak Amps
While most drivers will primarily jump-start passenger vehicles, some may need to jump-start larger engines. A jump starter’s capability is often indicated by its ‘peak amps’ rating, which represents its maximum current output. This is a useful initial indicator of power. However, actual performance under load can vary. Our Power Performance metric assesses each model’s real-world jump-starting capability, with higher scores indicating better performance for larger engines.
Storage Space and Durability Requirements
Size and weight differentiate SLA and lithium-ion jump starters, with lithium-ion models being more compact and lighter. Consider where you plan to store the jump starter – glove compartment, center console, or truck bed. For demanding environments, prioritize durability. Our Craftsmanship & Durability metric evaluates build quality, weather resistance, and overall robustness. For marine applications, this metric also considers waterproof ratings and cable length.
The NOCO Boost HD GB70 prioritizes durability and reliability, sacrificing superfluous features for robust performance.
Credit: Eric Bissell
Analysis and Test Results: Finding the Best Portable Jump Starter for Your Needs
We conducted head-to-head testing of popular portable jump starter models, encompassing both sealed lead-acid and lithium-ion battery technologies to comprehensively evaluate their performance and features, including USB power ports, AC adapters, and air compressors.
Best Value Recommendation
The ideal portable jump starter budget depends on your vehicle and usage scenarios. For compact cars and SUVs, or for those primarily seeking emergency jump-starting and phone charging, the NOCO Boost Plus GB40 offers excellent value without overspending. For users needing frequent use, 12-volt power capabilities, and an air compressor, the Dewalt DXAEJ14 is a strong choice. While lacking a compressor, the HULKMAN Alpha85S is a worthwhile investment for its exceptional performance and comprehensive features, including 12-volt accessory power. For an affordable yet effective jump starter, the GOOLOO GP2000 is a top contender.
The GOOLOO GP2000 excels in battery performance, making it exceptionally useful for charging electronic devices.
Credit: Rob Woodworth
Power Performance Analysis
Our Power Performance metric assesses each jump starter’s energy output when boosting a 12V battery. While ‘peak amps’ ratings are commonly used, real-world performance under load can vary. We tested each model across various jump-starting scenarios.
The HULKMAN Alpha85S exhibited the highest amperage output and significantly higher voltage in Force Start mode, making it the top performer for jump-starting larger engines quickly.
The HULKMAN Alpha85S demonstrated unmatched voltage output during our power performance assessment.
Credit: Ross Patton
The NOCO Boost HD GB70 and NOCO Boost Plus GB40 were top-rated lithium-ion units, consistently delivering sufficient power to jump-start engines up to seven liters. Lithium-ion jump starters excel at providing rapid bursts of energy.
The NOCO Boost HD GB70 features clamps large enough to securely connect to larger battery terminals.
Credit: Eric Bissell
In contrast, SLA jump starters like the Dewalt DXAEJ14, Clore Automotive JNC660, and Stanley J5C09 deliver a continuous current. While requiring recharging after each jump, they are capable of jump-starting larger diesel and deep-cycle marine batteries. Among SLA models, the Stanley J5C09 exhibited slightly lower current output under load in our tests.
The NOCO Boost Plus GB40 maintained a consistent 12-volt output throughout our power performance testing.
Credit: Ross Patton
Battery Storage Performance
Our Battery Storage evaluation considered watt-hour ratings, wattage during charging, and battery longevity when powering a 12-volt compressor.
The HULKMAN Alpha85S excelled in battery storage, outlasting all competitors. The GOOLOO 2000 also demonstrated commendable battery storage with an impressive 80Wh rating.
During our battery longevity tests, the Alpha85S portable jump starter significantly outperformed the competition.
Credit: Ross Patton
The NOCO Boost HD GB70 provided a comparable number of jump starts, but with a slightly lower 54Wh rating compared to other lithium-ion packs.
We successfully charged the NOCO Boost HD GB70 portable jump starter via the USB power ports available on the Dewalt DXAEJ14.
Credit: Rob Woodworth
For users needing only one or two emergency jump starts per charge, the NOCO Boost Plus GB40 is a suitable option. While not offering extended battery life or high amperage for large engines, it effectively serves most passenger vehicles.
The GB40 portable jump starter is ideally suited for owners of consumer vehicles seeking reliable jump-starting capability for themselves or others.
Credit: Ross Patton
SLA jump starters, such as the Clore Automotive JNC660, have lower watt-hour ratings than lithium-ion models. SLA batteries are designed for high current bursts over short durations, rather than prolonged wattage draw. However, they provide sufficient power for 12V accessories for several hours. The Dewalt DXAEJ14 and Stanley J5C09 include USB ports for charging mobile devices.
While not the most powerful jump starter, the GOOLOO GP2000 offers exceptional battery performance, particularly useful for charging electronic devices.
Credit: Rob Woodworth
Craftsmanship and Durability Assessment
Our Craftsmanship & Durability assessment examined build quality, waterproof ratings, switch durability, cable length, and overall device robustness.
For a rugged lithium-ion jump starter, the NOCO Boost HD GB70 stands out. Its permanently attached cables and robust construction ensure immediate readiness.
Lead-acid portable jump starter battery packs are significantly larger than their lithium-ion counterparts.
Credit: Eric Bissell
The NOCO Boost HD GB70 features durable materials, heavy-gauge cables, and secure port covers, reflecting meticulous attention to durability.
The HULKMAN Alpha85S incorporates a red emergency flashlight mode, a valuable safety feature in critical situations.
The Alpha85S portable jump starter includes a red flashing light setting for emergency signaling or roadside visibility.
Credit: Ross Patton
The Clore Automotive JNC660, while basic in features, is arguably the most durable SLA jump starter, featuring welder-grade cables and a no-frills design. The Dewalt and Stanley models have more components that could potentially fail. The GOOLOO 2000 exhibits decent build quality but uses thinner plastic and cables, and its port covers offer limited protection.
Ease of Use Evaluation
Our Ease of Use metric favored intuitive design and user-friendly features.
The HULKMAN Alpha85S excelled in ease of use. Simply connect the clamps, power it on, and a clear “READY” indicator signals when it’s ready to jump-start.
The HULKMAN Alpha85S portable jump starter features a precise digital battery level display and a “ready” indicator for user-friendly operation.
Credit: Ross Patton
The Clore Automotive JNC660 is remarkably simple to use: connect and jump-start. The NOCO Boost HD GB70 is also straightforward but includes safety features that may require a brief learning curve.
Carrying cases significantly improve the storage and portability of lithium-ion portable jump starters.
Credit: Rob Woodworth
The Dewalt DXAEJ14 was less intuitive, requiring manual consultation. It also lacks an auto-off feature, potentially leading to battery drain if not manually powered down.
Versatility Assessment
Our Versatility metric evaluated features beyond jump-starting.
The Dewalt DXAEJ14 offers the most extensive feature set, including a 120 PSI air compressor, pressure gauge, multiple power ports, work lights, and an alternator tester, making it ideal for home or shop use.
Having a built-in air compressor on the Dewalt DXAEJ14 portable jump starter is highly convenient for maintaining tire pressure on various vehicles and equipment.
Credit: Rob Woodworth
Models like the HULKMAN Alpha85S and NOCO Boost Plus GB40 offer ample versatility for most users, providing device charging and multiple recharging options. The Clore Automotive JNC660 is the least versatile, lacking USB ports and offering only extension cord charging.
While numerous portable jump starter options are available, we rigorously test to identify the models offering the best overall performance and features for your needs.
Credit: Eric Bissell
Conclusion: Choosing the Best Portable Car Battery Jump Starter
We hope this comprehensive review aids your search for the ideal portable car battery jump starter. In a crowded market, we aim to simplify your decision-making process, helping you select a model that best meets your specific requirements. A dead car battery can happen to anyone, and we trust our testing empowers you to confidently choose a portable jump starter that ensures you’re never stranded without power, whether on the roadside, in remote areas, or wherever your journey takes you.
In many situations, relying on assistance for a jump start isn’t feasible.
Having a portable car battery jump starter readily available can truly be a lifesaver in unexpected situations.
A portable jump starter is an essential tool, especially for those who frequently venture off the beaten path or prioritize self-sufficiency.
