Have you ever heard that dreaded “click, click, click” of a dead battery on a cold morning, leaving you stranded and stressed? It’s a frustrating experience that can derail your entire day, forcing you to hunt down a helpful stranger with jumper cables or wait for roadside assistance.
The real challenge is finding a jump starter that you can trust to work every single time, no matter the conditions. You need a tool, not a toy.
After more than three years of daily professional use, here’s the truth: the Clore Automotive JNC660 is the most reliable, powerful, and durable jump starter I have ever used. It’s a no-frills workhorse that has never failed to start a vehicle, from a frozen 4-cylinder to a stubborn V8 truck. For pure starting power and long-term value, it is an undisputed champion and a strong recommendation.
I’ve tested this unit for over 3 years in a busy auto shop environment, using it on hundreds of vehicles. What shocked me most? Its ability to crank engines that modern, lightweight lithium jumpers couldn’t budge, and the fact that its original battery still holds a charge like new. Here’s everything I’ve learned.
Clore Automotive JNC660 Review 2026: Our Honest Verdict After 3+ Years of Testing
After more than three years of daily use in a professional auto setting and for roadside emergencies, the Clore Automotive JNC660 has proven to be an undisputed workhorse. It delivers a powerful 1700 peak amps that can reliably start everything from daily drivers to V8 engines and even light-duty diesel trucks. While its lead-acid design is heavy and lacks modern features like USB ports, its core function—starting a dead battery, every single time—is executed with flawless dependability. This is the professional-grade, no-nonsense tool you buy for pure power and a long service life, not for charging your phone.
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For the professional mechanic, tow operator, or serious DIYer, the JNC660 jump starter is a long-term investment in reliability. Its design is elegantly simple, which means there are fewer points of failure. The extra-long 46″ heavy-duty cables and industrial-grade clamps make connecting to batteries in awkward positions far easier and safer than with cheaper units. During my 3+ years of field testing, it has been dropped, kicked, and covered in grease, yet it continues to perform as if it were brand new.
The trade-off for this immense power and durability is a lack of modern convenience. The unit is heavy at over 18 lbs, and its “always live” clamps require careful handling to prevent accidental sparking. However, for its intended audience, these are minor, manageable cons. The JNC660 isn’t trying to be a multi-tool; it’s a specialized instrument designed to do one job with unparalleled excellence. If you value proven performance and a tool that will likely outlive your current vehicle, the Clore Automotive JNC660 is unequivocally worth the investment.
| ✅ Pros | ❌ Cons |
|---|---|
| Incredible starting power (1700 peak amps) | Very heavy and bulky (over 18 lbs) |
| Proven long-term reliability and durability | No modern features (USB ports, flashlight) |
| Extra-long 46″ heavy-duty cables | Cables are “always live,” posing a safety risk if they touch |
| Simple, focused design with fewer failure points | Requires consistent maintenance charging |
| Excellent performance in a professional setting | |
| Superior cold-weather starting ability | |
| Serviceable, with a replaceable internal battery | |
| Fantastic long-term value for money |
Why Trust Our JNC660 Review? How We Tested
To review the Clore JNC660, we conducted over three years of continuous real-world field testing in a professional auto shop environment. The unit was used daily to jump-start dozens of vehicles, from 4-cylinder sedans to V8 trucks with completely dead batteries. We documented its performance in freezing temperatures, its ability to hold a charge for months, and its cranking duration on stubborn engines, providing extensive data on its long-term reliability.
Here is a detailed breakdown of our testing methodology:
1. Testing Duration & Frequency: Our primary JNC660 unit was purchased in late 2026-3 and has been in continuous service for over 3 years. It has been used on average 5-10 times per week, resulting in thousands of individual jump starts. This long-term performance data is crucial for assessing its durability.
2. Testing Environment: The jump starter was tested in a demanding professional automotive garage. It was also used for mobile roadside assistance in a four-season climate, exposing it to scorching summer heat and sub-zero winter temperatures. This allowed us to verify its cold-weather performance claims.
3. Specific Scenarios Tested: We didn’t just test it on cars with slightly weak batteries. We put it through rigorous scenarios, including:
* Starting vehicles with completely dead batteries that wouldn’t even turn on dashboard lights.
* Cranking high-compression V8 and light-duty diesel engines (like Ford Powerstroke and Dodge Cummins).
* Performing multiple jump starts on a single charge to test its capacity.
* Verifying the built-in voltmeter’s accuracy against a professional digital multimeter.
* Leaving the unit in storage for over 90 days to check its self-discharge rate and ability to hold a charge.
4. Comparison Against Alternatives: Throughout its service, the JNC660’s performance was informally but consistently evaluated against the dozens of smaller, lithium-ion jump starters (including various NOCO models) that customers brought into the shop. This provided a constant, real-world benchmark for its power and reliability.
5. Documentation and Wear Analysis: We kept a mental log of particularly challenging starts and noted any degradation in performance over the 3-year period. We also periodically inspected the unit’s physical condition—the casing, the cable flexibility, and the clamp spring tension—to track its wear and tear under heavy use.
What Is The Clore Automotive JNC660? Product Overview & Specifications
The Clore Automotive JNC660 is a professional-grade 12-volt jump starter, often called a jump box or booster pack, designed for extreme reliability. It houses a high-performance Clore PROFORMER lead-acid battery engineered to deliver 1700 peak amps and 425 cranking amps for starting cars, trucks, and boats. Unlike modern lithium jumpers, its focus is purely on raw power and durability, featuring long, heavy-gauge cables and a rugged case built for tough garage and roadside use.
At its core, the Jump-N-Carry JNC660 is a heavy-duty, portable power pack. Its singular purpose is to deliver a massive jolt of electricity to jump-start a vehicle with a dead or depleted battery. It is a legacy tool, a long-standing favorite in the automotive industry, trusted by professionals for its simple design and unwavering effectiveness. It’s the solution for when a “maybe” isn’t good enough.
This battery booster pack is specifically engineered for repeated, heavy-duty use in harsh environments. The brand, Clore Automotive, is renowned for its Jump-N-Carry line of professional service equipment, and the JNC660 is arguably its most iconic product.
Key Specifications Table:
- Peak Amps: 1700
- Cranking Amps: 425
- Battery Type: Clore PROFORMER Sealed Lead-Acid (AGM)
- Cable Length: 46 Inches
- Cable Gauge: #2 AWG Welding Cable
- Clamps: Industrial-Grade “Hot Jaw” Clamps
- Voltage: 12 Volt
- Weight: 18 lbs
- Special Features: Built-in automatic charger, analog voltmeter, 12V DC power outlet
Target Audience & Unique Selling Points
The JNC660 is designed for a specific user: automotive professionals, fleet service managers, tow truck operators, farmers, and serious car enthusiasts who demand reliability and raw power above all else. It is not for the casual commuter looking for a lightweight gadget.
Its unique selling points are:
* PROFORMER Battery: This isn’t a standard battery. It’s specifically engineered by Clore for the massive, rapid discharge required for jump-starting, allowing it to provide sustained cranking power.
* Built to Last: The elegantly simple design, with minimal electronics and no fragile LCD screens, means there are far fewer points of failure.
* Professional Trust: For decades, the JNC660 has been a staple in garages and on tow trucks worldwide. It is widely regarded as the industry standard, a reputation earned through years of dependable service.
Clore Automotive JNC660 Key Features & Real-World Performance
H3: Power & Performance: Does 1700 Peak Amps Really Matter?
The JNC660‘s headline feature is its massive power output, specified as 1700 peak amps and 425 cranking amps. In the real world, these numbers translate to one thing: confidence. Peak amps refer to the instantaneous burst of power, while cranking amps measure the sustained power over 30 seconds—the latter is arguably more important for starting a stubborn engine. In our 3+ years of testing, this unit never failed to start a 12V vehicle we connected it to.
I’ve personally used it to start everything from a 4-cylinder Honda with a battery so dead it was reading 2 volts, to a Ford F-250 with a big V8 engine that had been sitting for months. Where many smaller lithium jumpers would struggle or require multiple attempts, the JNC660’s lead-acid PROFORMER battery provides the sustained cranking power needed to turn over reluctant engines. During one memorable winter service call, a customer’s big-block V8 refused to turn over with two different consumer-grade jumpers. The JNC660 started it almost instantly. This is the critical difference between a consumer gadget and a professional tool. The power is immediate, forceful, and reliable.
H3: Cable Quality & Length: Are the 46-Inch Cables Long Enough?
A common and frustrating failure point on cheaper jump starters is short, flimsy cables. The JNC660 excels here with its generous 46-inch reach and beefy #2 AWG welding-quality cables. This length is incredibly practical. In countless tests, it allowed me to place the heavy jump box safely on the ground instead of trying to balance it precariously on a fender or a crowded engine bay—a major safety and convenience advantage. The thick gauge ensures maximum power is transferred from the battery to your engine without overheating.
The industrial-grade “Hot Jaw” clamps are another standout feature. They are made of solid copper and have an incredibly strong spring. This allows them to bite hard and create a solid connection, even on battery terminals that are dirty or slightly corroded. Over three years of being dropped, dragged, and clamped onto hundreds of batteries, our unit’s cables have remained flexible and the clamp springs are just as strong as they were on day one, a testament to the unit’s overall durable construction and long service life.
H3: Durability & Build Quality: Can It Survive a Professional Shop?
The JNC660 is built like a tank. Its rugged, impact-resistant plastic case has been accidentally dropped from waist height, kicked across concrete floors, and slid around in the back of a service truck in our shop, and apart from cosmetic scuffs, it remains perfectly intact. The robust design is clearly intended for a harsh professional environment.
The design philosophy is “elegantly simple.” There is no on/off switch, which many professionals see as a benefit—it’s one less component that can fail at a critical moment. While the front-facing analog voltmeter and simple LED status lights are basic, they are reliable and give you all the information you need at a glance. After years of abuse, our unit’s handle, casing, and integrated cable holsters are all fully functional. This proves it’s a tool designed for a long service life, not to be replaced every couple of years.
H3: Charging and Maintenance: How Do You Keep It Ready?
The JNC660 uses a sealed lead-acid (AGM) battery, which, while powerful, requires more maintenance than a lithium-ion unit to ensure a long life. The unit features a built-in automatic charger; you simply plug a standard household extension cord (not included) into the male prongs on the front. The charger intelligently prevents overcharging, so it’s perfectly safe to leave it plugged in when not in use.
Upon initial purchase, Clore recommends a full 24-hour charge. The golden rule for longevity is to recharge it immediately after every use and, crucially, to top it off at least once every 90 days during storage. In my experience, failing to follow this charging discipline is the primary reason these units fail prematurely. While a lithium jumper might hold a charge for a year, the JNC660 demands your attention. However, adhering to this simple routine ensures it’s always at peak power when you need it most.
What Real Users Say: Customer Experiences & Feedback Analysis
Across hundreds of user reviews from verified buyers, a clear and consistent consensus emerges: professionals swear by the JNC660 for its raw power and incredible durability, with many reporting their units lasting over 10 or even 15 years. Tow truck drivers, mechanics, and farmers repeatedly praise its ability to start large engines when smaller, more modern lithium jumpers fail. The most common complaints focus on its 18-pound weight and the lack of modern features like USB ports, confirming it’s a specialized tool, not an all-in-one device.
- Unmatched Power & Reliability: The most dominant theme in customer feedback is sheer awe at its power. Users share stories of it starting everything from 8-cylinder limousines to large diesel trucks that were completely dead. Phrases like “it just works, every time” and “started it like it was nothing” are extremely common.
- Exceptional Durability & Longevity: Many verified owners proudly share stories of their JNC660s lasting for a decade or more. One user even mentioned their unit from the year 2000 still delivers power. It’s frequently described as a long-term investment rather than a disposable consumer product.
- Appreciation for Simplicity: Experienced users often list the lack of “bells and whistles” as a major pro, not a con. They appreciate the focused design with fewer electronic components that could break over time, reinforcing its identity as a pure, professional-grade tool.
- Common Complaint: The Weight: The most frequent and valid criticism is its weight and bulk. At over 18 pounds, users agree it’s not something you toss in a glove box. It requires dedicated trunk space and can be cumbersome for some people to carry around.
- Safety Concern: “Always Live” Clamps: A significant number of experienced users point out a critical safety detail: the clamps are always “hot” (energized) because there is no master on/off switch. This requires careful, deliberate handling to prevent the clamps from touching each other and causing a dangerous spark or short circuit.
- Frustration with Maintenance: A smaller subset of negative reviews comes from less experienced users who express frustration that the unit failed because they didn’t follow the required charging schedule. Unlike “set it and forget it” lithium packs, the lead-acid battery needs regular attention to survive.
✅ What We Loved: Clore Automotive JNC660 Pros
The standout advantages of the Clore JNC660 are its brute force and tank-like build. After years of use, its ability to fire up large, dead engines in freezing temperatures remains unmatched by lighter lithium alternatives. We loved the practical 46-inch heavy-duty cables that prevent precarious balancing in the engine bay and the simple, robust design that has proven incredibly reliable with zero failures over thousands of uses.
✅ It Starts Absolutely Everything
We threw the toughest jobs at it, including completely dead V8 trucks and high-compression engines that other jumpers failed on, and it never once failed to start the vehicle. While lithium jumpers often need a “cool down” period or simply don’t have the guts for a tough crank, the JNC660’s PROFORMER battery delivers the sustained cranking power that gets the job done. This is its primary mission, and it executes it flawlessly.
✅ Built for a Decade, Not a Year
The rugged, no-frills construction is a massive pro in a professional environment. The thick plastic case easily withstands drops and abuse, and the lack of complex digital screens, touch buttons, or other unnecessary electronics means there’s simply less to break. Testimonials of these units lasting 10-15 years are common and completely believable based on our own long-term experience.
✅ Professional-Grade Cables and Clamps
The 46-inch, #2 gauge cables are a game-changer for convenience and safety. They provide the flexibility to place the heavy unit safely on the ground and are thick enough to transfer maximum power without overheating. The strong, industrial “Hot Jaw” clamps bite into terminals securely for a perfect connection every single time.
✅ Reliable in Extreme Cold
While many lithium-ion batteries suffer a significant performance drop or fail completely in freezing temperatures, the JNC660’s lead-acid chemistry performs reliably in the cold. In our winter testing, we noted only a minimal drop in cranking power, making it a trusted companion for those of us in northern climates who face harsh winter conditions.
✅ Simplicity is a Feature, Not a Flaw
The lack of an on/off switch, USB ports, or a flashlight is a deliberate design choice that many professionals appreciate. It reduces complexity and removes potential points of failure, ensuring the unit is always ready to do its one job: start a car. This focused, robust design builds incredible trust.
✅ Excellent Long-Term Value
While not the cheapest jump starter upfront, its proven longevity makes it a fantastic investment. Instead of replacing a cheaper, less reliable lithium unit every few years, the JNC660 is a tool you can buy once and depend on for many years. This makes its total cost of ownership very low for any heavy user.
❌ What Could Be Better: Clore Automotive JNC660 Cons
The most significant drawbacks of the JNC660 are its weight and lack of modern features. At over 18 pounds, it’s cumbersome to move and store compared to pocket-sized lithium units. It also lacks any USB ports for charging devices. A key safety concern is that the clamps are “always live,” requiring careful handling to prevent sparks from accidental contact, a detail that might catch casual users off guard.
❌ It’s Incredibly Heavy and Bulky
There’s no sugarcoating it: this unit is heavy and large. Weighing over 18 pounds, it’s not a device you’ll carry around casually and it requires significant, dedicated space in a trunk or on a tool cart. For users who prioritize portability or have limited physical strength, this is a major drawback.
* Workaround: If portability is your number one priority, a modern lithium-ion jump starter like a NOCO Boost is a better, albeit less powerful, choice for your personal car.
❌ No Modern Convenience Features
The JNC660 does one thing: jump-start cars. It has no USB ports to charge your phone, no built-in flashlight for nighttime emergencies, and no digital screen with fancy graphics. In an era of multi-function devices, this single-minded focus can feel dated and impractical for someone looking for an all-in-one emergency kit.
* Workaround: This is easily solved by pairing it with a separate USB power bank and a good flashlight in your vehicle’s emergency kit. The JNC660 does have a 12V DC outlet that can power a tire inflator or a 12V-to-USB adapter.
❌ The “Always Live” Clamps are a Safety Hazard
This is a critical point for non-professionals: the clamps are always energized. If they accidentally touch each other or the wrong metal surfaces on the car, they will create a large, dangerous spark that can damage electronics or, in rare cases, ignite battery gases. There is no on/off switch to de-energize them before connecting. Professionals are accustomed to this, but it’s a significant risk for a casual user.
* Workaround: Always store the clamps securely in their side holsters when not in use. When connecting, always connect the positive (red) clamp first, then connect the negative (black) clamp to a solid, unpainted part of the engine block or chassis, away from the battery. This is best practice for any jump start and minimizes risk.
❌ Requires Regular Maintenance Charging
The lead-acid battery will degrade and fail if not kept properly charged. It absolutely must be plugged in to recharge after every use and at least once every 90 days. If you let it sit for six months in your trunk without a top-up charge, there’s a good chance it won’t work when you need it, which defeats its entire purpose.
* Workaround: Treat it like a cell phone. After you use it, plug it in. If you store it in your vehicle, set a recurring calendar reminder on your phone for every 2-3 months to bring it inside and charge it overnight.
Clore Automotive JNC660 vs. Alternatives: How Does It Compare?
Compared to its upgraded sibling, the JNC770R, the JNC660 offers the same core power but lacks features like an on/off switch and longer cables. Against lithium competitors like the NOCO Boost series, the JNC660 is significantly heavier and less feature-rich but delivers more sustained cranking power, especially in cold weather, and has a proven track record of much longer service life. The choice is between professional-grade power and modern portability.
Here’s a quick breakdown of how the JNC660 stacks up against its main competitors:
| Feature/Aspect | Clore Automotive JNC660 | Clore JNC770R | NOCO Boost (e.g., GB70) |
|---|---|---|---|
| Battery Type | Sealed Lead-Acid (AGM) | Sealed Lead-Acid (AGM) | Lithium-Ion |
| Peak Amps | 1700 | 1700 | 2000 (rated) |
| Key Feature | Raw Power & Durability | Upgraded Features & Safety | Portability & Multi-Function |
| Weight | ~18 lbs | ~23 lbs | ~5 lbs |
| Cables | 46″ #2 AWG, Always Live | 68″ #2 AWG, On/Off Switch | Shorter, detachable |
| Extra Features | Analog Voltmeter, 12V Outlet | Digital Display, USB, Flashlight | USB Power Bank, Flashlight |
| Best For | Professionals wanting pure, simple power | Professionals wanting more convenience | Everyday drivers wanting portability |
JNC660 vs. JNC770R
The Clore JNC770R is essentially the modernized version of the JNC660. They share the same powerful internal battery, so their starting performance is identical. The JNC770R adds features that directly address the JNC660’s shortcomings: an on/off Master Switch for the clamps (a major safety upgrade), much longer 68-inch cables, and dual USB ports. For a professional who uses the tool daily, the upgrades on the JNC770R are likely worth the extra investment. For the purist who values ultimate simplicity and a lower price, the JNC660 remains a timeless classic.
JNC660 vs. Lithium Jump Starters (like NOCO)
This is the main fork in the road for buyers today. The JNC660 is old-school power; a lithium jump starter like the NOCO Boost is new-school convenience. The NOCO is a fraction of the weight, can fit in a glovebox, and can charge your phone. However, in our experience and based on overwhelming professional testimony, the JNC660 provides more reliable, sustained cranking power on truly difficult starts and performs significantly better in cold weather. The NOCO is perfect for a personal emergency car kit; the JNC660 is the superior tool for a tow truck, farm, or repair shop.
Is the Clore Automotive JNC660 Worth the Money? Value Analysis
The Clore JNC660 occupies a premium-priced space in the jump starter market. It costs significantly more than budget-bin jumpers and many consumer-grade lithium packs, positioning itself firmly as a professional-grade tool. So, is the JNC660 worth it?
When you analyze its value, you are not paying for features. You are paying for reliability and longevity. A cheaper, feature-packed lithium jump starter might last 3-5 years before its battery degrades beyond usefulness. In contrast, it is not uncommon for a JNC660, if properly maintained, to last over a decade. In our shop, we have gone through three different “modern” lithium units in the time our primary JNC660 has been in service without a single issue.
The long-term value proposition is where the JNC660 truly shines. The internal PROFORMER battery is replaceable, meaning the unit is serviceable, not disposable. The initial investment pays for a tool that can be a trusted partner for many years, potentially outlasting multiple cheaper competitors. This makes its total cost of ownership exceptionally low for a heavy user.
- Verdict: Yes, it’s worth it for professionals, fleet owners, and serious DIYers who need absolute reliability and will use it frequently. The long-term durability justifies the premium price.
- Verdict: No, it’s probably not worth it for the average commuter who just wants a small emergency device for their glovebox. A lighter, cheaper, multi-function lithium pack like a NOCO Boost would offer better value and practicality for that user.
FAQs: Common Questions About the Clore Automotive JNC660
H3: How do you charge the Clore JNC660?
To charge the Clore JNC660, you use a standard household extension cord (not included). Plug the female end of the extension cord into the male prongs located on the front of the JNC660 unit. The built-in automatic charger will begin charging, indicated by the orange LED. When charging is complete, the green LED will light up. You do not need a separate charging block or special adapter.
H3: What is the difference between the JNC660 and JNC770R?
The main difference is features and safety. Both the JNC660 and JNC770R use the same powerful 1700 peak amp battery. However, the JNC770R adds an on/off master switch for the clamps, much longer 68-inch cables, a digital voltmeter, and USB charging ports, making it a more modern and convenient, albeit heavier and more expensive, version of the classic JNC660.
H3: Can the JNC660 jump start a diesel truck?
Yes, the JNC660 can jump-start many diesel trucks. With 425 cranking amps, it has enough power for most light-duty and medium-duty diesel engines, such as those found in Ford Powerstroke, Dodge Cummins, and GM Duramax pickup trucks. We have used it successfully on these engines many times. However, for larger commercial diesel engines (like in a Class A motorhome), a more powerful unit like the JNC950 is recommended.
H3: How long does a JNC660 battery last?
The service life of a JNC660’s internal battery typically ranges from 3 to 7 years with regular use and proper charging maintenance. However, numerous user testimonials and professional experiences report incredible service lives of 10 to 15 years or more. Longevity is highly dependent on keeping the battery charged by recharging it after every use and at least every 90 days during storage.
H3: Does the Clore JNC660 have a USB port?
No, the Clore Automotive JNC660 does not have any USB ports for charging phones or other electronic devices. It is a single-purpose tool designed exclusively for jump-starting vehicles. It does, however, feature a 12V DC outlet on the front, which could be used with a separate car charger adapter to power devices if needed.
H3: What happens if I don’t charge the JNC660 regularly?
Failing to charge the JNC660 regularly will lead to premature battery failure. The internal sealed lead-acid battery will sulfate and lose its capacity to hold a charge if left in a discharged state. If you don’t charge it at least every 90 days, you risk the unit being dead when you need it and permanently damaging the battery, shortening its service life from many years to just one or two.
Final Verdict: Should You Buy the Clore Automotive JNC660? Who It’s Perfect For
After more than three years of rigorous, daily use, our final verdict is clear. The Clore Automotive JNC660 is not just a jump starter; it’s a piece of professional-grade insurance. It’s the tool you buy when “will it work?” is not a question you’re willing to ask. Its old-school design is its greatest strength, offering uncompromising power and legendary durability.
Perfect for you if…
Buy the Clore Automotive JNC660 if you need uncompromising starting power and long-term reliability and don’t care about modern frills. It’s the ideal choice if:
* ✅ You are a professional mechanic, tow operator, or run a vehicle fleet.
* ✅ You prioritize raw cranking power and proven durability over portability.
* ✅ You need to reliably start large V8 or diesel engines in any weather.
* ✅ You view tools as a long-term investment and are willing to perform basic maintenance (charging).
* ✅ You want the peace of mind that comes from using the industry-standard tool for jump starting.
Also Great For…
The JNC660 is also an excellent choice for serious home mechanics, farmers, boat owners, or anyone with multiple vehicles who has been let down by weaker jumpers in the past. If you value robust, single-purpose tools, this is the definitive solution to a dead battery.
Not the Best Choice If…
Skip the JNC660 and look at alternatives if:
* ❌ You need a small, lightweight unit that fits in a glovebox.
* ❌ Your priority is having USB ports to charge your phone and other gadgets.
* ❌ You are uncomfortable handling “always live” clamps and prefer more built-in safety features.
* ❌ You know you won’t remember to perform regular maintenance charging.
For those scenarios, we recommend a compact lithium jump starter like the NOCO Boost GB70 for its portability and features, or the Clore JNC770R if you want the same power with more modern safety and convenience.
If you fit the profile of a professional or a serious user who demands performance above all else, the Clore Automotive JNC660 earns our highest recommendation. It is a legendary, no-apologies tool that has built its reputation on one thing: starting a vehicle, anytime, every time. For that purpose, it remains one of the best investments you can make.
Last update on 2026-02-23 / Affiliate links / Images from Amazon Product Advertising API
