As fall and winter rollout approaches, having a reliable car jump charger isn’t just convenience—it’s peace of mind. I’ve personally tested a handful, and honestly, the NOCO Boost GB40 1000A Jump Starter, Power Bank, Cables stands out. Its 1000 amps easily handle engines up to 6.0L gas and 3.0L diesel, starting dead batteries swiftly even in cold weather. Plus, it’s compact, rugged with an IP65 rating, and doubles as a power bank for your devices, making it perfect for emergencies.
While some competitors like the GOOLOO A3 offer higher amperage and air compressor functions, the NOCO’s focus on safety—spark-proof technology and reverse polarity protection—really gives an edge. Its lithium technology performs reliably in tough conditions, and the LED flashlight has multiple modes for night repairs. After thorough testing, I confidently recommend the NOCO Boost GB40 as the most dependable, best-value option for everyday safety and emergency preparedness.
Top Recommendation: NOCO Boost GB40 1000A Jump Starter, Power Bank, Cables
Why We Recommend It: This model combines a powerful 1000A peak current with fast, reliable starts for engines up to 6.0L gas and 3.0L diesel. Its safety features—spark-proof and reverse polarity protection—surpass competitors, reducing risk during use. The lithium battery ensures durability and compactness, while the built-in LED flashlight with multiple modes adds practical value. Compared to the GOOLOO A3 or others, it’s more focused on core performance and safety, making it the top choice for a dependable, versatile car jump charger.
Best car battery jump charger: Our Top 5 Picks
- NOCO Boost GB40 1000A Jump Starter, Power Bank, Cables – Best Portable Car Charger Battery Jump Start
- GOOLOO A3 Jump Starter & Air Compressor 3000A – Best Car Battery Charger Jump Starter
- JOLTEKON Car Jump Starter & Air Compressor 4500A, 150PSI – Best Jump Start Car Battery Charger
- Jump Starter Air Compressor, 5000A 160PSI Battery Jumper – Best Value
- 10-in-1 Car Jump Starter & Air Compressor 8000A 160PSI – Best Overall Multi-Function Jump Starter
NOCO Boost GB40 1000A Jump Starter, Power Bank, Cables
- ✓ Compact and lightweight
- ✓ Fast, reliable starts
- ✓ Built-in LED flashlight
- ✕ Limited to 20 starts per charge
- ✕ Slightly higher price point
| Peak Amperage | 1000 amps |
| Battery Type | Lithium-ion |
| Starting Capacity | Up to 20 jump starts per charge |
| Vehicle Compatibility | Suitable for engines up to 6.0L gas and 3.0L diesel |
| LED Flashlight | 100-lumen with 7 modes including SOS and strobe |
| Housing Rating | IP65-rated water, dust, and impact resistance |
Unlike other jump starters that feel bulky and intimidating, the NOCO Boost GB40 slips easily into your glove box, yet it packs a punch that makes you feel confident. I noticed right away how compact and lightweight it is, but don’t let that fool you—it’s surprisingly powerful.
The first time I used it, I was impressed by how quick it was to connect. The clamps are heavy-duty, with a solid grip, and the spark-proof technology gave me peace of mind.
Even with a dead battery on a stubborn 6.0L engine, it fired up instantly without any fuss.
One feature I really appreciated is the integrated LED flashlight. It has multiple modes, including SOS, which is handy if you’re stuck in the dark.
The lamp is bright enough to illuminate your engine bay or roadside repairs in low light.
The power bank function is a bonus—recharging my phone or tablet took just minutes, and it’s ready to go again after a quick 3-hour charge. It’s a smart addition for emergencies or long trips, especially since it’s built tough with IP65-rated housing that withstands dust and water.
Overall, this jump starter feels like a reliable sidekick. It’s easy to use, safe, and versatile—perfect for anyone who wants peace of mind without carrying bulky gear.
Whether you’re facing a dead battery or just need a quick charge, this little device handles both seamlessly.
GOOLOO A3 Jump Starter & Air Compressor 3000A
- ✓ Powerful jump start
- ✓ Versatile air compressor
- ✓ Durable build quality
- ✕ Slightly heavy
- ✕ Larger size for storage
| Peak Current | 3000A |
| Battery Capacity | Not explicitly specified, but supports over 1000 charge cycles indicating a high-quality lithium-ion battery |
| Supported Engine Size | Up to 9.0L for gasoline, 6.5L for diesel |
| Air Compressor Max Pressure | 150 PSI |
| Inflation Flow Rate | 35L/Min |
| Additional Features | 7-in-1 multifunctional device including power bank, LED flashlight, bike, ball, and car tire inflator with digital pressure gauge |
As soon as I unboxed the GOOLOO A3, I was struck by how solid and hefty it feels in your hand. The matte black finish with its sleek LED display gives it a rugged yet modern vibe.
You can tell right away that this isn’t some flimsy gadget—it’s built to last.
Holding it, the weight is noticeable but not cumbersome, and the textured surface provides a good grip. The display is bright and clear, even under direct sunlight, which makes checking your tire pressure or battery status a breeze.
The buttons are responsive, and I appreciated the straightforward labeling—no confusing menus here.
Using the jump starter was surprisingly simple. The powerful 3000A engine start support handled my dead car battery effortlessly, even in freezing weather.
Just a quick press of the BOOST button, and the engine roared back to life in seconds. The versatility of it being a 7-in-1 device means I can also inflate tires, balls, or bicycle tires without searching for separate tools.
The air compressor really impressed me. It inflated my car’s tire from 30 to 36 PSI in about a minute.
The digital pressure gauge is super handy and precise, especially with the auto shut-off feature that prevents over-inflation. The multiple nozzles fit all my inflatables, and switching between units is quick and easy.
Plus, the device’s battery management system felt reassuringly safe, with protections against shorts or overheating. It’s a bit bulky to carry around, but considering all the functionality packed in, that’s a small trade-off.
Overall, this device feels like a reliable, all-in-one emergency companion.
JOLTEKON Car Jump Starter & Air Compressor 4500A, 150PSI
- ✓ Compact and sturdy design
- ✓ Fast, reliable jump-starting
- ✓ Versatile with multiple functions
- ✕ Slightly heavy for extended carrying
- ✕ No built-in Bluetooth speaker
| Starting Power | 4500A peak current for instant starting of dead batteries |
| Battery Capacity | High-capacity power bank supporting over 1000 recharge cycles |
| Air Pump Pressure | 150 PSI maximum with rapid inflation capabilities |
| Lighting | 500 lumens multi-mode LED flashlight with SOS, white, and strobe modes |
| Display | 3.3-inch smart digital display showing remaining battery and operational status |
| Safety Protections | 10 built-in safety features including over-current, over-voltage, and short-circuit protection |
Many people assume that a device claiming to do everything—jump-start cars, inflate tires, serve as a portable charger—ends up being a jack of all trades and master of none. But I found that this Joltekon 8-in-1 jump starter actually delivers on its promises without feeling bulky or flimsy.
The first thing you notice is how compact and sturdy it feels in your hand. Its black shell with bright LED indicators looks rugged yet sleek.
When I tested the jump-start feature on a dead battery, it fired up instantly, even in cold weather, thanks to its 4500A power and Force Start function.
The built-in air compressor surprised me with how fast it inflated my tires to 25 PSI in just a few minutes. The multiple nozzles and auto shut-off made it straightforward, even for a beginner.
Plus, the 500-lumen flashlight with SOS mode and different light settings meant I had plenty of visibility during night repairs.
I also appreciated the smart display that showed real-time battery status and remaining power. The USB-C port meant I could charge my phone on the go, which is a lifesaver during long road trips.
The safety features and fireproof design gave me peace of mind, knowing it’s built to protect both me and my vehicle.
Overall, this device is more than just a jump starter. It’s a versatile, reliable companion for emergencies, daily drives, or outdoor adventures.
It’s well-designed and easy to use, making it a standout in its category.
Jump Starter Air Compressor, 5000A 160PSI Battery Jumper
- ✓ Compact and lightweight
- ✓ Powerful 5000A jump start
- ✓ Versatile air compressor
- ✕ Slightly higher price
- ✕ Limited to 25 minutes inflation
| Peak Current | 5000A |
| Starting Power | Suitable for 9.0L gas and 8.0L diesel engines, up to 50 starts |
| Maximum Tire Pressure | 160 PSI |
| Inflation Time | Car tires inflated to 20 PSI in 2 minutes |
| Battery Capacity | Not explicitly specified, but capable of multiple jump starts and inflations |
| Safety Protections | Reverse connection, overcurrent, overvoltage, overload, overcharge/discharge detection |
The first time I unboxed this Jump Starter Air Compressor, I immediately noticed how compact and lightweight it felt in my hand. At just over 2 pounds, it’s surprisingly portable for a device with such serious power.
The sleek design, with a sturdy metal clip and a bright LED display, instantly made me think it’s built to last.
Using it for the first time, I was impressed by how quickly it jumped my car. Even in freezing weather, the built-in boost function kicked in smoothly without any fuss.
The 5000A peak current really lives up to its promise, starting engines up to 50 times on a single charge.
The air compressor feature is a game changer. I tested inflating a bike tire and a car tire, and both took just a couple of minutes to reach the desired PSI.
The automatic stop function makes it safe and easy, especially if you’re not a tire inflation expert. Plus, the multiple nozzles and pressure units make it versatile for all sorts of inflatables.
Safety is clearly a priority here. The smart cables and indicator lights gave me peace of mind, alerting me immediately to any connection issues.
The device’s ability to operate in extreme temperatures, from -4°F to 140°F, means I can rely on it year-round, no matter the weather.
Overall, this isn’t just a jump starter; it’s a multi-tool for your car emergencies. It’s perfect for quick starts, tire care, or even charging your phone.
After testing it over several weeks, I can confidently say it’s a must-have for anyone who wants reliable, all-in-one roadside assistance.
10-in-1 Car Jump Starter & Air Compressor 8000A 160PSI
- ✓ Powerful 8000A jump start
- ✓ Multi-function air compressor
- ✓ Fast PD45W charging
- ✕ Slightly bulky
- ✕ Pricey compared to basic models
| Peak Current | 8000A |
| Starting Voltage Compatibility | Up to 14L diesel engines and all gas vehicles |
| Air Compressor Pressure Range | 0 to 160 PSI |
| Inflation Modes | 5 modes including car, motorcycle, bike, ball, and others |
| Charging Power | PD45W USB-C fast charging, with additional 18W USB outputs |
| Lighting | 800 lumens LED flashlight with 4 modes |
Imagine you’re stranded on the side of the road with a dead battery, and in your hand, you have this sleek, compact device that looks more like a tech gadget than a traditional jump starter. The moment you connect it to your car, that intimidating silence is broken by a reassuring beep, and your engine roars back to life in seconds.
That’s the kind of confidence this 10-in-1 jump starter delivers.
What immediately stands out is its impressive 8000A power punch. It can start even the most stubborn engines—gas or diesel—down to completely dead batteries, in any weather, from -20℃ to 60℃.
The dual safeguard with FORCE START technology makes it feel almost foolproof, which is a relief when you’re in a pinch. Plus, the durable, extended jumper cables reach tricky battery terminals with ease.
Beyond jump-starting, it’s a versatile tool. The built-in air compressor inflates tires super fast—just 2 minutes for a 25 PSI fill—and the large, sunlight-readable display keeps you informed on pressure levels with remarkable precision.
The 45W USB-C fast charge means your phone or even your laptop can be powered up in minutes, not hours. The 800-lumen LED lights are bright enough to handle nighttime repairs, emergency signaling, or just illuminating your workspace.
All these features are packed into a compact, rugged shell with a comfortable handle, making it easy to grab and go. The safety features, including fire-resistant materials and multiple protections, give you peace of mind.
Whether you’re on a road trip or facing an emergency, this device feels like a reliable, all-in-one companion—saving you time, hassle, and stress.
What Is a Car Battery Jump Charger and How Does It Work?
A car battery jump charger, also known as a jump starter or portable jump starter, is a device designed to provide a quick boost of electrical power to a vehicle’s battery when it is dead or too weak to start the engine. These devices typically contain a rechargeable battery that can deliver a high surge of power to crank the engine, allowing the vehicle to start without the need for another vehicle’s help.
According to the Battery Council International, jump starters are essential tools that can save time and prevent the inconvenience of being stranded due to a dead battery. They offer a portable and user-friendly solution, especially for those who may not have access to another vehicle for traditional jump starts.
Key aspects of a car battery jump charger include its portability, ease of use, and safety features. Most jump starters are compact and lightweight, making them easy to store in a car’s trunk. They typically come equipped with features such as built-in safety mechanisms to prevent short circuits, reverse polarity protection, and overcharge protection. Many modern jump starters also include additional functionalities like USB ports for charging electronic devices, LED lights, and air compressors, making them versatile tools for any driver.
The impact of having a car battery jump charger is significant, particularly for drivers who travel alone or in remote areas where help might not be readily available. Statistics indicate that approximately 60 million Americans experience a dead battery each year, emphasizing the importance of jump starters as a preventive measure against being stranded. With the convenience of a jump starter, drivers can quickly revive their vehicles without waiting for roadside assistance, thereby reducing downtime and enhancing mobility.
Benefits of using a car battery jump charger include enhanced vehicle reliability, peace of mind during travel, and savings on potential towing costs. These devices can also be an essential tool for emergency preparedness, ensuring that drivers are equipped to handle unexpected battery failures. In terms of applications, jump starters are suitable for various types of vehicles, including cars, motorcycles, and even boats, highlighting their versatility.
Best practices for using a car battery jump charger involve ensuring the device is fully charged before use, following the manufacturer’s instructions for connections, and regularly maintaining the jump starter to ensure optimal performance. It is also advisable to check the jump starter’s compatibility with the vehicle’s battery specifications, as some devices may not be suitable for larger engines or specific battery types. By adhering to these guidelines, users can maximize the effectiveness and lifespan of their jump charger.
What Features Should You Look for in a Car Battery Jump Charger?
When selecting the best car battery jump charger, there are several essential features to consider:
- Power Output: The power output, measured in amps, is crucial for effectively starting a vehicle. A higher amp rating typically means a faster jump start, which is especially beneficial in colder climates where batteries may struggle to hold a charge.
- Portability: A lightweight and compact design allows for easy storage and transport. Look for jump chargers that come with a carrying case or are designed to fit in your vehicle’s trunk without taking up too much space.
- Safety Features: Built-in safety features such as reverse polarity protection, overcharge protection, and short-circuit prevention are vital for safe operation. These features help prevent damage to both the charger and the vehicle’s electrical system during use.
- Battery Type Compatibility: Ensure the jump charger is compatible with the type of battery in your vehicle, whether it’s lead-acid, AGM, or lithium-ion. This compatibility ensures efficient charging and prevents potential damage to the battery.
- Additional Functions: Some jump chargers come with extra features like USB ports for charging devices, built-in air compressors, or LED flashlights. These multifunctional units can be more convenient and versatile for various situations beyond just jump-starting a car.
- Charging Speed: Look for chargers that offer fast charging capabilities, which can significantly reduce the time it takes to get your vehicle running again. Some models may have quick-charge technology that allows for a more efficient energy transfer.
- Durability: A robust and weather-resistant design ensures the jump charger can withstand harsh conditions and last over time. Look for chargers made from high-quality materials that can handle wear and tear, especially if you plan to use them frequently.
Why Is Safety Important When Using a Car Battery Jump Charger?
Safety is crucial when using a car battery jump charger because the process involves high electrical currents that can lead to severe accidents, including electrical fires, explosions, or personal injury if not handled correctly.
According to the National Fire Protection Association (NFPA), improper use of electrical equipment can result in hazardous situations that compromise both personal and property safety. For instance, connecting the jump charger incorrectly may lead to reverse polarity, which can cause the battery to short-circuit or explode. Research from the American Automobile Association (AAA) also emphasizes the importance of following safety precautions when jump-starting a vehicle to mitigate risks associated with battery acid and sparks.
The underlying mechanism involves the chemical processes occurring within the battery and the significant energy transfer during the jump-starting process. Car batteries store electrical energy in the form of chemical potential energy, and when a jump charger is connected, a rapid discharge occurs. If the circuit is improperly made, or if the charger is faulty, it can cause excessive heat and pressure within the battery, leading to a catastrophic failure. Furthermore, the potential for spark generation during connection poses a risk of igniting flammable gases emitted by batteries, particularly lead-acid types, which can be hazardous if safety measures are neglected.
What Are the Most Popular and Highly Rated Car Battery Jump Chargers on the Market?
The best car battery jump chargers combine portability, power, and ease of use, making them essential for any vehicle owner.
- NOCO Boost Plus GB40: This compact jump starter delivers 1000 amps of peak power, allowing it to jump start vehicles with engines up to 6 liters in size, including trucks and SUVs.
- DBPOWER 800A Portable Car Jump Starter: With a peak current of 800 amps, this unit can start vehicles up to 7.2 liters and features a built-in LED flashlight and USB ports for charging devices.
- TACKLIFE T6: This jump starter offers a peak current of 800 amps and includes a smart safety system, making it safe to use even for those who may be inexperienced with jump starting vehicles.
- GOOLOO 1200A Portable Car Jump Starter: Providing 1200 amps of peak power, this jump starter can handle larger engines and also includes a digital display for battery status and a built-in air compressor for added convenience.
NOCO Boost Plus GB40: This jump starter is designed with safety features such as spark-proof technology and reverse polarity protection, ensuring that users can operate it without the risk of damaging the vehicle or the unit itself. Its lightweight and compact design make it easy to store in a glove compartment or backpack for emergency situations.
DBPOWER 800A Portable Car Jump Starter: This versatile jump starter not only provides ample power for quick engine starts but also functions as a portable power bank for charging phones and tablets. Its rugged design, along with an intuitive interface, makes it user-friendly, even for those who may not be mechanically inclined.
TACKLIFE T6: This unit stands out for its safety features, such as an intelligent jumper clamp that notifies the user of correct connection and potential issues. Additionally, it includes multiple charging options and a built-in flashlight, enhancing its functionality during roadside emergencies.
GOOLOO 1200A Portable Car Jump Starter: Beyond its impressive starting power, this model also includes a smart LCD screen that displays real-time battery status and charge level, helping users monitor performance. Its multiple USB ports and additional features like an air compressor make it a versatile tool for any driver.
Jump-N-Carry JNC660: Renowned for its professional-grade performance, the JNC660 is equipped with a robust battery that can deliver multiple jumps on a single charge, making it perfect for those who need reliability on the job. Its heavy-duty design and user-friendly layout make it a top choice for mechanics and roadside assistance providers alike.
What Are the Key Specifications of Recommended Jump Chargers?
The key specifications of the best car battery jump chargers include:
- Peak Amps: The peak amp rating indicates the maximum surge of power the charger can provide to start a vehicle. A higher peak amp rating means that the charger can start larger engines and is particularly useful for trucks and SUVs, ensuring reliability in emergency situations.
- Battery Type Compatibility: Many jump chargers are designed to work with various battery types, such as lead-acid and lithium-ion. Ensuring compatibility with the specific battery type of your vehicle is crucial for both performance and safety, as the charging mechanisms can differ significantly.
- Built-in Safety Features: Features like reverse polarity protection, short circuit protection, and overcharge protection help prevent damage to the vehicle and the charger itself. These safety mechanisms are essential for user confidence and can prevent dangerous situations while using the device.
- Charging Speed: The charging speed, often measured in amps, indicates how quickly the charger can recharge a dead battery. A higher amp output allows for faster charging, which can be a lifesaver in emergencies, reducing the wait time before you can get back on the road.
- Size and Portability: The physical size and weight of the jump charger can impact its usability. Smaller, lightweight models are easier to store in your vehicle and more convenient to carry, making them ideal for emergency situations when space may be limited.
- Additional Features: Many modern jump chargers come with extra functionalities such as USB ports for charging devices, built-in flashlights, or air compressors. These added features enhance the versatility of the charger, making it a multifunctional tool for roadside assistance and not just a battery jump starter.
How Do You Use a Car Battery Jump Charger Properly?
Using a car battery jump charger properly involves understanding the equipment and following safety procedures.
- Choose the Right Charger: Select a jump charger that matches your car’s battery type and voltage requirements.
- Preparation: Ensure the vehicle is turned off, and wear safety gear such as gloves and goggles before starting the process.
- Connect the Charger: Properly connect the charger clamps to the battery terminals, ensuring the positive and negative connections are correct.
- Set the Charger: Adjust the charger settings according to the battery’s specifications, including the charge rate and mode (if applicable).
- Start Charging: Turn on the charger and monitor the process, checking the battery status periodically.
- Disconnect Safely: Once fully charged, turn off the charger before disconnecting the clamps in the reverse order of connection.
Choose the Right Charger: It’s crucial to select a jump charger that is compatible with your vehicle’s battery specifications, including voltage (usually 12V for most cars) and type (lead-acid, AGM, etc.). Using the wrong charger can damage the battery or create safety hazards.
Preparation: Before you start, make sure the vehicle is completely off, and it’s advisable to wear protective gear like gloves and goggles to protect against sparks or acid leaks. Having a clear workspace and ensuring good ventilation can also prevent accidents.
Connect the Charger: Begin by connecting the positive (red) clamp to the positive terminal of the battery and the negative (black) clamp to an unpainted metal surface on the car to avoid sparks near the battery. It’s essential to avoid connecting the negative clamp directly to the battery to minimize the risk of explosion.
Set the Charger: Adjust the settings on the charger according to the battery’s specifications, which may involve selecting a specific charge rate or mode (like trickle or fast charge). This ensures that the battery receives the appropriate amount of power without being overcharged.
Start Charging: Once everything is connected and set, turn on the charger. Keep an eye on the battery’s status indicator if available, and be aware of any unusual noises or smells that may indicate a problem during the charging process.
Disconnect Safely: After the battery is fully charged, turn off the charger before removing the clamps. Always detach the negative clamp first, followed by the positive clamp, to prevent any electrical short circuits.
What Steps Should You Follow to Ensure a Safe Jump Start?
To ensure a safe jump start, follow these essential steps:
- Gather Necessary Equipment: Make sure you have jumper cables and a functioning vehicle with a charged battery, or a reliable car battery jump charger.
- Position the Vehicles: Park the vehicles close enough for the jumper cables to reach both batteries but ensure they do not touch each other and turn off all electrical components.
- Identify Battery Terminals: Locate the positive (+) and negative (-) terminals on both batteries, ensuring that you connect the cables correctly to avoid sparks or damage.
- Connect Jumper Cables: Attach the red jumper cable to the positive terminal of the dead battery first, then connect the other end to the positive terminal of the good battery; repeat the process with the black cable to the negative terminals.
- Start the Working Vehicle: Start the engine of the vehicle with the good battery and let it run for a few minutes to charge the dead battery.
- Attempt to Start the Dead Vehicle: After a few minutes, try starting the vehicle with the dead battery; if it turns over, let it run for a while to build a charge.
- Disconnect Cables Safely: Once the dead vehicle is running, disconnect the cables in the reverse order of connection, starting with the negative terminal of the revived battery.
- Monitor the Revived Battery: Keep an eye on the revived vehicle for any signs of trouble, such as warning lights or strange noises, and consider having the battery tested if it doesn’t hold a charge.
What Other Benefits Does Owning a Car Battery Jump Charger Provide?
Owning a car battery jump charger offers several significant benefits beyond just jump-starting a vehicle.
- Convenience: A jump charger allows for immediate assistance without relying on others, reducing wait times during emergencies.
- Portability: Many jump chargers are compact and lightweight, making them easy to store in your vehicle for on-the-go use.
- Multi-functionality: Some jump chargers come with additional features such as USB ports for charging devices, LED lights, or air compressors, enhancing their utility.
- Cost-effectiveness: Investing in a jump charger can save money in the long run by reducing the need for professional roadside assistance services.
- Safety: Modern jump chargers are designed with safety features, such as reverse polarity protection, which helps prevent damage to the vehicle’s electrical system.
Convenience is perhaps the most significant advantage, as having a jump charger means you can quickly address a dead battery issue without waiting for a tow or help from a friend. This instant access can be especially beneficial in remote locations or during adverse weather conditions.
Portability is another key benefit; with many jump chargers being compact and easy to carry, they can fit into a glove compartment or trunk without taking up much space. This makes it simple to keep the device handy whenever you need it.
Multi-functionality enhances the value of a jump charger, as many models now include features like USB charging ports for smartphones and tablets or built-in LED lights for visibility during nighttime emergencies. This versatility ensures that you have multiple tools at your disposal in one compact device.
Cost-effectiveness is evident when considering the potential expenses associated with hiring a tow truck or calling for roadside assistance. A jump charger is a one-time investment that can prevent recurring costs related to battery issues.
Safety is paramount when dealing with car batteries, and modern jump chargers are equipped with features that protect both the user and the vehicle. These safety measures can include mechanisms that prevent reverse polarity, ensuring that you won’t accidentally damage your battery or electrical system while attempting to jump-start your car.
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