A dead car battery can throw a wrench into your day, leaving you stranded and frustrated. Whether it’s a cold morning, forgotten headlights, or just time taking its toll, battery failures are a common automotive woe. That’s where the Best Jump Boxes come to the rescue. These portable powerhouses are designed to deliver a burst of energy, instantly reviving your battery and getting you back on the road without needing another vehicle or jumper cables.
In this comprehensive guide, we’ve rigorously tested and evaluated a range of jump starters, also known as jump boxes, to bring you our top recommendations for 2024. We’ve assessed each model on key factors like power performance, battery storage, durability, ease of use, and versatility to help you choose the best jump box to suit your specific needs. From compact lithium-ion units perfect for everyday cars to robust sealed lead-acid options for shop use, we’ve got you covered. Let’s dive into the top contenders in the best jump boxes category.
Best Overall Jump Box
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
- Long-lasting battery life on a single charge
- Includes a variety of useful accessories and adapters
REASONS TO AVOID
- Does not include a dedicated carrying case
- Larger and bulkier than some lithium-ion jump boxes
- Higher price point compared to some competitors
For those who demand top-tier performance and a comprehensive feature set in a sleek package, the HULKMAN Alpha85S stands out as the best overall jump box. Our rigorous testing revealed its superior power delivery. “In our power assessment, this model consistently produced a higher voltage than any other jump starter we evaluated,” our lead tester emphasized. Beyond raw power, the Alpha85S excels in battery efficiency. “Not only did the battery last significantly longer during our tests, but the Alpha85S also recharged faster than the competition,” the tester added.
The design is user-friendly, featuring a prominent digital display that shows the exact battery percentage, removing the guesswork associated with traditional LED meters. A bright integrated flashlight adds to its practicality, and its form factor allows for easy storage under a car seat or in a door pocket. The Alpha85S is versatile in charging options, accepting power via USB or the included 12-volt car outlet adapter, and it can, in turn, charge USB and 12-volt devices.
SPECIFICATIONS
| Feature | Value |
|---|---|
| Peak Amps | 2000 |
| Starting Amps | 500 |
| Watt Hours | 74 |
| Number of Jump Starts | 60 |
| Number of Cell Phone Charges | 20 |
Despite its impressive features, the HULKMAN Alpha85S surprisingly lacks a simple storage pouch for its cords and adapters. It is also physically larger than other lithium-ion jump boxes of similar type. “While smaller than any sealed lead acid model, other lithium-ion jump boxes are compact enough to easily fit in a center console or glove box,” noted one tester. The Alpha85S is also a more expensive option. However, for unparalleled performance and cutting-edge technology, the Alpha85S is the ultimate best jump box choice. For a more budget-friendly and compact alternative, consider the NOCO Boost Plus GB40. While it may not match the Alpha85S in power, it still provides reliable lithium-ion jump-starting capability with its Boost mode.
The HULKMAN Alpha85S offers a top-tier kit in the lithium-ion jump box category.
Best Bang for Your Buck Jump Box
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 extended charge retention
- Impressive 2000 peak amp rating
- Generous 73-watt-hour battery capacity
- Offers USB and 12V DC accessory power outputs
REASONS TO AVOID
- May struggle with jump-starting larger engines
- Includes a somewhat bulky carrying case
- 12V AC car adapter is sold separately
If your primary need is a versatile portable power bank with jump-starting as a secondary function, the GOOLOO GP2000 delivers exceptional value as the best bang for your buck jump box. Its high-capacity lithium-ion battery and multiple charging ports are standout features. This model boasts a 37Wh lithium-ion battery, claiming up to 2000 peak amps for jump-starting. “While it wasn’t the most powerful for boosting large batteries in trucks,” one tester noted, “it reliably handled eight consecutive jump starts on a 2.5-liter engine before needing a recharge.” The GP2000 truly shines as a portable power bank, excelling in charging electronics via its USB ports. Our tests showed it could fully charge an iPhone up to 15 times using the 5V USB port on a single charge. A USB-C port further enhances its charging versatility.
SPECIFICATIONS
| Feature | Value |
|---|---|
| Peak Amps | 1,200 |
| Starting Amps | 500 |
| Watt Hours | 37 |
| Number of Jump Starts | 8 |
| Number of Cell Phone Charges | 3 |
While excellent for powering devices, the GOOLOO GP2000’s jump-starting performance is somewhat less impressive. Our lead tester observed, “It is definitely capable of reviving mid-size batteries, but it lacks the raw power for larger engines and high cranking amps.” However, its substantial 37Wh battery ensures long charge retention, making it a reliable power source for your devices on the go. The GOOLOO GP2000 is a strong contender for powering accessories and provides a solid jump-starting capability for its price, making it a hard-to-beat value proposition as the best bang for your buck jump box.
The GOOLOO GP2000 jump box demonstrates its USB charging capability, functioning like a standard 5V 2A wall charger.
Best Compact Jump Box
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 portable design
- Lightweight for easy handling and storage
- Features a convenient Boost Mode for immediate starts
- IP65 waterproofing for enhanced durability
REASONS TO AVOID
- Does not include a wall plug for charging
- Less powerful for starting larger engines
- Battery life is adequate but not exceptional
- Limited additional features beyond jump-starting and USB charging
If space is a premium in your vehicle, or you prefer a jump starter that’s discreet and doesn’t take up much room, the NOCO Boost Plus GB40 is our top recommendation as the best compact jump box. “This surprisingly powerful device is remarkably small compared to most of the competition,” a team member remarked, “yet it consistently started every vehicle we tested.” Unlike many jump starters that require a waiting period, the GB40’s Boost Mode delivers a rapid power surge to your battery, often allowing for immediate engine starts. For those who are tough on their equipment, the GB40 boasts an IP65 waterproof rating. “While not submersible, it can easily withstand rain and dust exposure,” one tester commented.
SPECIFICATIONS
| Feature | Value |
|---|---|
| Peak Amps | 1000 |
| Starting Amps | 500 |
| Watt Hours | 24 |
| Number of Jump Starts | 10 |
| Number of Cell Phone Charges | 4 |
In terms of versatility, the NOCO Boost Plus GB40 is more limited. It functions as a car jump starter and USB device charger, but that’s essentially it. Charging is solely via USB cable, and a wall adapter is not included for indoor charging. At 1000 peak amps, the GB40 is not ideally suited for larger engines. “The compact size also means a shorter battery life,” our lead tester pointed out, “so regular charging is necessary with this model.” Despite these limitations, the NOCO GB40’s overall performance, especially considering its size, is impressive. If your budget allows, the Hulkman Alpha85S offers a more powerful battery and a wider range of accessories, making it a step up in the portable jump starter category.
For peace of mind in a small package, the NOCO Boost Plus GB40 jump box is a great choice for discreet in-vehicle storage.
Best Jump Box 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
- Extremely rugged and durable construction for demanding environments
- Higher peak amps than many competitors
- Integrated 120 PSI air compressor with digital settings
- Can be charged via 12V DC or 120 AC power sources
- Includes dual USB ports and a 12V 10A outlet for accessory power
REASONS TO AVOID
- Heavy and less portable than lithium-ion jump boxes
- Limited storage for cables and included accessories
- Not designed for multiple consecutive jump starts without recharging
- Lower watt-hour battery capacity compared to some
For an all-in-one power solution for your home garage or professional shop, the Dewalt DXAEJ14 is the best jump box for home or shop use. It offers a range of functionalities beyond just jump-starting. “Need to inflate tires, check your alternator, or charge your phone?” our lead tester highlighted, appreciating the Dewalt’s utility beyond jump-starting. The integrated 120 PSI air compressor is particularly useful, featuring an LCD screen for setting precise PSI levels. In addition to 1400 peak amps for jump-starting, it provides power for accessories via dual USB ports and a 12V DC outlet. While not as light or portable as lithium-ion models, it can effectively jump-start larger engines and still have power to spare for other tasks.
SPECIFICATIONS
| Feature | Value |
|---|---|
| Peak Amps | 1,400 |
| Starting Amps | 700 |
| Watt Hours | 21 |
| Number of Jump Starts | 2 |
| Number of Cell Phone Charges | 4 |
A drawback of the Dewalt DXAEJ14 is that, unlike lithium-ion models that can provide multiple jumps on a single charge, it requires recharging after each jump. As a sealed lead-acid battery unit, regular charging is crucial – Dewalt recommends monthly top-ups. However, the Dewalt DXAEJ14 compensates with a larger 21 amp-hour battery compared to other SLA jump boxes. “This power capacity, combined with its versatility and robust build, makes it ideal for home and shop environments,” noted one tester. For a more budget-conscious SLA jump box with similar features like a USB port and 120 psi air compressor, the Stanley J5C09 1000 Peak Amp is a viable alternative.
The Dewalt DXAEJ14 jump box is our top pick for a sealed lead-acid model with an integrated air compressor, perfect for home or shop use.
Compare Jump Boxes
Jump boxes come in various sizes and power capacities, with compact lithium-ion models being surprisingly powerful.
How We Test Jump Boxes
Our jump box testing process is comprehensive, designed to push each unit to its performance limits. We evaluate models ranging from 1000 to 2000 peak amps, representing a wide spectrum of power capabilities. Testing involves jump-starting a diverse fleet of vehicles, from a small 650cc motorcycle to a large 6.7L V8 diesel truck and a 454 horsepower inboard boat engine. We meticulously monitor voltage and current during each jump start. Whenever possible, we bypass the vehicle’s battery entirely to assess the cold-start capability of each jump box. Our evaluation includes both lithium-ion and sealed lead-acid battery types, ensuring a complete understanding of their respective strengths and weaknesses under identical testing conditions.
Our jump box ratings are based on five key metrics:
- Power Performance (30% of overall score): Evaluates the jump starter’s ability to deliver sufficient current and voltage for effective engine starting.
- Battery Storage (30% of overall score): Assesses the battery capacity, longevity, and ability to hold a charge over time and provide multiple jump starts.
- Craftsmanship & Durability (20% of overall score): Examines the build quality, materials, ruggedness, water resistance, and overall robustness of the jump box.
- Ease of Use (15% of overall score): Rates the intuitiveness of controls, clarity of displays, ease of connection, and overall user-friendliness of the jump box.
- Versatility (15% of overall score): Considers additional features such as USB charging ports, air compressors, work lights, and other functionalities that enhance the jump box’s utility.
Many jump boxes include integrated flashlights, a feature we consider highly valuable in emergency roadside situations.
The HULKMAN Alpha85S jump box demonstrates its power by running a 12-volt air compressor during our battery life tests.
Jump boxes offer a significantly easier and safer alternative to traditional jumper cables.
Why Trust Keyfobx.com?
The jump box review team at keyfobx.com is led by experienced professionals with extensive backgrounds in automotive technology and hands-on vehicle maintenance. Ross Patton, a veteran team member and primary tester, brings years of experience in off-roading, overlanding, and battery-powered systems. His formal education in Environmental Science from the University of Nevada, Reno, coupled with his passion for technology and adventure, makes him uniquely qualified to evaluate jump box performance in real-world scenarios.
Rob Woodworth, another key tester, is a Coast Guard Certified Captain with deep expertise in 12V systems and battery maintenance. His routine work involves maintaining deep-cycle marine batteries for heavy equipment and off-grid solar power systems. Rob’s practical knowledge of battery performance, honed through years of hands-on experience, provides invaluable insights into the reliability and effectiveness of jump boxes. Together, Ross and Rob’s combined expertise ensures our jump box reviews are thorough, in-depth, and trustworthy.
Keyfobx.com testers utilize professional-grade voltmeters and load testers for rigorous jump box evaluations.
Our testing process goes beyond simple product use; we subject each jump box to a series of exhaustive tests using professional-grade electronic voltage meters and load testers to quantify performance objectively.
Keyfobx.com testers conduct detailed comparisons of components like jumper cable clamps during our in-depth jump box reviews.
How to Pick the Best Jump Box for Your Needs
Choosing the best jump box involves considering several key factors to ensure you select a model that meets your specific requirements. While many jump boxes may appear similar at first glance, our detailed testing has revealed significant differences that can impact real-world performance. Before making a purchase, consider these important aspects:
Sealed Lead Acid vs. Lithium-Ion Batteries
The battery type is a fundamental differentiator between jump boxes. Sealed lead-acid (SLA) and lithium-ion (LI) batteries each offer distinct advantages. SLA batteries are heavier and bulkier but are generally more affordable and have a longer lifespan if properly maintained. They require recharging after each jump start and tend to lose charge over time. LI batteries are significantly lighter and more compact, offering more power for their size and retaining charge for longer periods. LI jump boxes can often provide multiple jump starts on a single charge.
Visually, LI batteries are typically found in slim, modern-looking jump boxes, while SLA jump boxes are characterized by their larger, boxier, and heavier design. Weight is a key indicator – LI jump boxes usually weigh under five pounds, while SLA models can exceed 15 pounds.
Jump Start Frequency
Consider how often you anticipate needing to use a jump box. If jump starts are infrequent and primarily for emergencies, a model with exceptional battery storage might be less critical. However, if you regularly need to jump-start vehicles or want a jump box that can provide power for extended periods, battery capacity becomes a more important factor. While manufacturers may list milliamp-hours (mAh) or amp-hours (Ah), watt-hours (Wh) is a more useful metric for comparing battery storage potential across different voltages. A higher watt-hour rating generally indicates more jump starts per charge and longer run times for powering accessories.
Engine Size and Power Requirements
Engine size directly influences the power required for jump-starting. Jump box capability is often rated by ‘peak amps,’ indicating the maximum current output. While peak amps provide a general power comparison, the actual performance under load can vary. For jump-starting larger engines, especially diesel engines or those with high cranking amp requirements, choose a jump box with a higher peak amp rating and robust power performance. Our Power Performance metric helps identify models best suited for larger engines.
Storage and Portability
Size and weight are crucial, especially if you plan to store the jump box in your vehicle. LI jump boxes are the clear choice for portability and space-saving storage. However, if portability is less of a concern and rugged durability is paramount, some larger SLA models might be suitable for work trucks or shop environments. Consider where and how you’ll be storing your jump box and choose a size and weight that aligns with your needs. Also, assess the build quality and durability, especially if the jump box will be exposed to harsh conditions. Our Craftsmanship & Durability metric helps evaluate which models are built to withstand demanding use.
The NOCO Boost HD GB70 jump box prioritizes durability and reliability, ideal for demanding environments.
Analysis and Test Results: Finding the Best Value
The optimal jump box for you depends on your vehicle type, lifestyle, and budget. For owners of compact cars or SUVs who need a reliable jump box primarily for emergency starts and occasional phone charging, the NOCO Boost Plus GB40 offers excellent value and portability. If you require a more versatile device with 12-volt power capabilities and an air compressor, the Dewalt DXAEJ14 is a strong contender for home and shop use. For those seeking a high-performance jump box with exceptional capabilities, including powering 12-volt accessories, the HULKMAN Alpha85S is a worthwhile investment despite lacking a compressor. Finally, for an affordable and effective jump starter that gets the job done without breaking the bank, the GOOLOO GP2000 is an excellent budget-friendly choice.
The GOOLOO GP2000 jump box provides exceptional battery performance for charging electronics, offering great value for its price.
Power Performance Breakdown
Our power performance testing highlighted key differences in current and voltage output among the jump boxes. The HULKMAN Alpha85S consistently delivered the highest amperage output and significantly higher voltage in Force Start mode, making it the top performer for jump-starting larger engines quickly and reliably.
The HULKMAN Alpha85S jump box consistently demonstrated unmatched voltage output in our power performance assessments.
The NOCO Boost HD GB70 and NOCO Boost Plus GB40 also excelled in power performance among lithium-ion units. With peak amp ratings exceeding 1000A, they effectively jump-started engines up to 7 liters. Lithium-ion jump boxes are generally designed for quick bursts of energy, ideal for jump-starting.
The NOCO Boost HD GB70 jump box features large clamps that comfortably fit and securely grip larger battery terminals.
In contrast, SLA jump boxes like the Dewalt DXAEJ14, Clore Automotive JNC660, and Stanley J5C09 deliver a more constant current. While they may require recharging after each jump, they are capable of jump-starting larger diesel and deep-cycle marine batteries. Among SLA models, the Stanley J5C09 showed slightly lower current output under load compared to the Dewalt and Clore Automotive models.
The NOCO Boost Plus GB40 jump box maintained a voltage output around 12 volts during our power performance tests.
Battery Storage Capacity
For battery storage, the HULKMAN Alpha85S again emerged as the leader, outlasting all competitors in our longevity tests. If extended battery life is a priority, the Alpha85S is the top choice. The GOOLOO 2000 also demonstrated commendable battery storage with its 80Wh capacity.
During battery longevity testing, the Alpha85S jump box significantly outperformed all other models in terms of battery life.
The NOCO Boost HD GB70 provided comparable jump starts to competitors but has a slightly lower 54Wh battery capacity compared to some other lithium-ion models.
The Dewalt DXAEJ14 jump box demonstrates its versatility by partially charging a NOCO Boost jump box through its USB power ports.
If you primarily need a jump box for occasional emergency starts, the NOCO Boost Plus GB40 is sufficient. While it doesn’t have the extended battery life of larger models or the high amperage for massive diesel engines, it meets the needs of most passenger vehicle owners.
The GB40 jump box is well-suited for consumer vehicles, providing peace of mind with reliable jump-starting for personal use or assisting others.
SLA jump boxes like the Clore Automotive JNC660 have lower watt-hour ratings than lithium-ion models. SLA batteries are designed for high current bursts for short durations rather than sustained power draw. However, they can power 12V accessories for a few hours, and models like the Dewalt DXAEJ14 and Stanley J5C09 include USB ports for charging mobile devices.
While not the most powerful jump starter, the GOOLOO GP2000 jump box excels in battery performance, making it highly convenient for charging electronics.
Craftsmanship and Build Quality
Our craftsmanship and durability assessment focused on build quality and robustness. For a rugged, no-compromise lithium-ion jump box, the NOCO Boost HD GB70 stands out. Its permanently attached cables, heavy-gauge wiring, and well-sealed port covers demonstrate exceptional attention to durability.
Lead-acid jump boxes are significantly larger and heavier compared to their lithium-ion counterparts.
The NOCO Boost HD GB70 utilizes heavy-duty materials, robust cables, and secure port covers, emphasizing long-term durability and reliability.
The HULKMAN Alpha85S includes a thoughtful emergency red flashlight mode, a potentially life-saving feature in roadside emergencies.
The Alpha852S jump box incorporates a red flashing light setting for emergency signaling or roadside safety.
The Clore Automotive JNC660, while not the most feature-rich, is arguably the most durable SLA jump box with heavy-duty welder-grade cables and a straightforward, no-frills design. The Dewalt and Stanley models, with more features and components, have a higher potential for component failure or loss of accessories if not properly stored. The GOOLOO 2000, while reasonably well-built, uses thinner plastics and cables and lacks robust port covers, giving a less premium impression compared to more reputable brands.
Ease of Operation
For ease of use, the HULKMAN Alpha85S is a top performer. Its intuitive interface and clear “READY” indicator simplify the jump-starting process.
The HULKMAN Alpha85S jump box features a user-friendly display showing precise battery level and a “ready” indicator for jump-starting.
The Clore Automotive JNC660 is also exceptionally simple to use – just connect and jump. The NOCO Boost HD GB70 is straightforward but includes safety features that may require a brief learning curve.
Carrying cases enhance the portability and ease of storage for lithium-ion jump boxes.
The Dewalt DXAEJ14 is less intuitive, requiring manual consultation for proper operation, and lacks an auto-off feature, potentially leading to battery drain if not manually powered down.
Versatility and Features
The Dewalt DXAEJ14 excels in versatility, offering a 120 PSI air compressor, pressure gauge, multiple power ports, work lights, and an alternator tester, making it a multi-functional power station for home or job sites.
The integrated air compressor in the Dewalt DXAEJ14 jump box is highly useful for inflating tires and other inflatables.
Models like the HULKMAN Alpha85S and NOCO Boost Plus GB40 offer good versatility, allowing for charging various devices and providing multiple recharging options. The Clore Automotive JNC660 is the least versatile, lacking USB ports and only offering AC extension cord charging.
The market offers numerous jump box options, making it essential to identify the best model for your specific home and vehicle requirements.
Conclusion: Your Perfect Jump Box Awaits
We hope this comprehensive review has illuminated your path to finding the perfect jump box. In a market saturated with options, we aim to provide clarity and help you select a model that best fits your needs. A dead car battery can happen to anyone, and having a reliable jump box ensures you’re never stranded, whether on the road or off the beaten path.
In many situations, relying on another vehicle for a jump start simply isn’t feasible.
A jump box is an invaluable tool, especially for those who frequently venture into remote areas or rely on their vehicle in emergencies.
A jump box is an essential tool for anyone who values preparedness and independence, especially in areas where roadside assistance may be delayed or unavailable. Invest in the best jump box for your needs and drive with confidence, knowing you’re prepared for unexpected battery issues.
