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Best Portable Battery Jump Starter (2024 Update)

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If you’re looking for a reliable way to jump-start your car without the need for another vehicle, a portable battery jump starter might be just what you need. These devices can provide the power you need to start your engine even if your car battery has completely died.

Before buying a portable battery jump starter, there are a few factors you should consider. First, you should make sure that the device has enough power to start your car’s engine. Check your vehicle’s owner’s manual to determine the necessary amperage. Additionally, you should consider the weight and size of the jump starter, as well as any additional features such as built-in flashlights or USB charging ports.

When shopping for a portable battery jump starter, you may be wondering which features are the most important. Ask yourself, do you need a device with a high amperage rating to start a larger engine? Do you need a unit that includes extra features like a flashlight or USB charging ports? It can also be helpful to read reviews from other customers to get an idea of which devices have performed well for others. By considering these factors and asking the right questions, you can find the best portable battery jump starter to meet your needs.

10 Best Portable Battery Jump Starter

# Product Image Product Name Product Notes Check Price
1
Jump starting gasoline and diesel engines up to 32-Liters with a portable lithium battery booster pack and commercial jumper cables.
2
Ideal for jump starting car batteries with up to 10.0L gas and 8.0L diesel engines, and as a USB-C powerbank charger.
3
Jump-starting car batteries and charging mobile devices for gas engines up to 7.5L and diesel engines up to 5.0L.
4
It is ideal for jump starting all gas or diesel vehicles up to 10L, portable use, LED lighting, and fast charging.
5
It is ideal for jump starting cars, trucks, boats, and other vehicles, as well as providing portable power for electronic devices.
6
The product is ideal for jump starting cars and charging electronic devices with its high capacity power bank.
7
Ideal for jump starting vehicles without the need for a regular charging source, with a long lifespan and ability to work in extreme environments.
8
The product is an ideal portable power bank that can jump-start a car with gas or diesel engines up to 10.0L.
9
The product is an ideal car starter and battery booster pack for large gas and diesel engines.
10
The product is ideal for jump-starting gasoline and diesel engines of up to 16-liters with commercial jumper cables.
Jump starting gasoline and diesel engines up to 32-Liters with a portable lithium battery booster pack and commercial jumper cables.
Ideal for jump starting car batteries with up to 10.0L gas and 8.0L diesel engines, and as a USB-C powerbank charger.
Jump-starting car batteries and charging mobile devices for gas engines up to 7.5L and diesel engines up to 5.0L.
It is ideal for jump starting all gas or diesel vehicles up to 10L, portable use, LED lighting, and fast charging.
It is ideal for jump starting cars, trucks, boats, and other vehicles, as well as providing portable power for electronic devices.
The product is ideal for jump starting cars and charging electronic devices with its high capacity power bank.
Ideal for jump starting vehicles without the need for a regular charging source, with a long lifespan and ability to work in extreme environments.
The product is an ideal portable power bank that can jump-start a car with gas or diesel engines up to 10.0L.
The product is an ideal car starter and battery booster pack for large gas and diesel engines.
The product is ideal for jump-starting gasoline and diesel engines of up to 16-liters with commercial jumper cables.

1. Ultrasafe Diesel Jump Starter & Booster Pack

Introducing the Boost Max Series, the most powerful lithium jump starters ever created by the brand. With over 3000-amps of starting power, this device is designed for the largest, most challenging engine starts out there. It can jump start gasoline and diesel engines up to 32-liters with ease.

One of the most notable features of this jump starter pack is its UltraSafe design. Unlike other jump starters, there's no need to worry about incorrect connections or sparks. The mistake-proof design includes spark-proof technology and reverse polarity protection to provide users with a safe and easy experience when connecting to any 24-volt battery.

The GB251 24V UltraSafe Lithium Jump Starter Pack and Power Bank boast commercial-grade quality. It can jump-start almost every type of vehicle and equipment, from semi-trucks (up to class 8), motorhomes, coaches, buses, mining, agricultural, construction, and vocational equipment – 6, 8, 12, and 16 cylinders – and more. Additionally, the integrated digital battery voltmeter enhances diagnostics for an easy assessment of battery health.

Despite its incredible power, this jump starter is beyond portable thanks to its high discharge lithium technology. Weighing in at just 14-pounds, it's the most compact and lightweight design of its kind. Plus, the portable carrying case makes jump starting more convenient than ever.

The Boost Max Series is more than just a lithium jump starter. It's also a portable power bank that can recharge smartphones, tablets, and other USB devices. The ultra-bright 600-lumen LED flashlight with seven different light modes, including emergency strobe and SOS, makes it a multi-functional device that's perfect for outdoor adventures and emergencies.

In the package, customers will receive the GB251 24V UltraSafe Lithium Jump Starter Pack and Power Bank, XGC4 56W Power Adapter with interchangeable 60-inch (1.5m) AC cords for Australia (Type I), Europe (Type C), North America (Type A), United Kingdom (Type G) – XGC Kit, Max Protection EVA Case, and a 1-Year Limited Warranty. The Boost Max Series is a reliable and powerful jump starter that's perfect for anyone who needs a safe and easy-to-use device for their large engines.

2. Ultrasafe Jump Starter And Powerbank Charger

Introducing the Extreme Series, the all-new design of Boost X for Extreme – the portable lithium car battery jump starter with extreme jump starting power rated at 4250-amps. The Boost X is not an upgrade, it's a whole new series that releases maximum energy at every start for powerful engines.

Boost X comes equipped with USB-C technology that allows for lightning-fast recharges. With power delivery and a complete recharge time of just 2.7 hours, you can go from 0% to jump starting in just 5 minutes of charge.

Charge everything with USB-C Power Delivery. Boost X's internal power bank provides 60-watts of power – both in and out – to effortlessly power your favorite USB-C devices, like phones, tablets, laptops, wearables, and more.

UltraSafe 2.0 is our enhanced version of the UltraSafe technology. Our simple, mistake-free design still features spark-proof technology and reverse polarity protection. However, we've improved the thermal efficiency and power management to provide better performance and longer battery life.

Boost X is one of the most versatile lithium jump starters on the market. It can jump start all types of vehicles, including cars, motorcycles, trucks, ATVs, boats, RVs, vans, SUVs, tractors, and more for up to 10.0-liter gasoline and 8.0-liter diesel engines.

With Boost X, you'll receive the GBX155 UltraSafe Portable Lithium Car Battery Booster Jump Starter Pack and Power Bank with 60W USB-C Power Delivery, Heavy-Duty Jumper Cable Clamps, USB-C Charging Cable, 12V USB-C Fast Charger, Microfiber Storage Bag, 1-Year Warranty, and it's designed in the USA.

3. Ultrasafe Lithium Jump Starter & Usb-C Powerbank

Introducing the Extreme Series Boost X – the ultimate portable lithium car battery jump starter that packs extreme jump starting power for powerful engines. Capable of delivering a whopping 1750-amps, this all-new design is a game-changer in the jump starter industry.

The Boost X comes turbo chargeable with its USB-C technology, which combined with power delivery gives you lightning-fast recharges. It only takes 1.2-hours to completely recharge the Boost X, or you can go from 0% to jump starting in just 5-minutes of charge.

Charge Everything with the Boost X. Its internal power bank provides 60-watts of power – both in and out – allowing you to effortlessly power your favorite USB-C devices, such as phones, tablets, laptops, wearables, and more.

The Boost X features the latest UltraSafe 2.0 technology. It's still the simple, mistake-free design that you've come to know and love, featuring spark-proof technology and reverse polarity protection. However, it now boasts enhanced thermal efficiency and power management, providing better performance and longer battery life.

One of the most versatile lithium jump starters ever, Boost X is capable of jump starting all vehicle types, including cars, motorcycles, trucks, ATVs, boats, RVs, vans, SUVs, tractors, and more for up to 7.5-liter gasoline and 5.0-liter diesel engines.

When you purchase the Boost X, you'll receive the GBX55 UltraSafe Portable Lithium Car Battery Booster Jump Starter Pack and Power Bank with 60W USB-C Power Delivery, Heavy-Duty Jumper Cable Clamps, USB-C Charging Cable, Microfiber Storage Bag, 1-Year Warranty, and Designed in the USA.

4. Jumpmax 4000: Ultimate Portable Car Booster

The AVAPOW car jump starter is the perfect solution for drivers who want a reliable and efficient way to jump-start their car in an emergency. With a powerful 4000A peak current, this jump starter can easily start all 12V cars, including hybrid power vehicles, motorcycles, ATVs, UTVs, lawn mowers, snowmobiles, and more – up to 60 times on a full charge.

One of the standout features of this car jump starter is its intelligent protection system. Designed to be sturdy and durable, the jumper clamp is equipped with safety measures such as short circuit, low battery, high temperature, and reverse connection protection. The prompt indicator and buzzer ensure that you're using the jumper box correctly.

In addition to being a reliable lithium car starter, the AVAPOW jump starter doubles as a portable car power supply with high capacity. It features dual USB 3.0 output ports (USB 1: 5V/3A, 9V/2A, 12V/1.5A; USB 2: 5V/2.4A), which charge 75% faster than ordinary mobile power. The jump starter is also compatible with almost all USB charging devices, including mobile phones, tablets, cameras, Kindle, and more.

The AVAPOW car jump starter is also equipped with a multifunctional LED light with three working modes (flashlight/SOS/strobe). The super bright LED lights provide more convenience for night use and can be used as an emergency tool. This multifunctional flashlight is perfect for camping, outdoor activities, emergencies, travel, and more.

Your purchase includes a Portable Battery Starter, Jumper Cables, USB-C Cable, Cigarette Lighter Converter, Carry Case, and User Manual. Additionally, the product comes with a professional and 24-hour online after-sales team for any issues. Please note that no adapter is included, but all of your cell phone USB type chargers can be used to charge the jump starter.

5. Schumacher Psj-4424 Dsr Proseries 4400 Peak Amps Jump Starter And Portable Power Unit

The product being described is a powerful jump starter that boasts impressive peak and cranking amps, making it an ideal choice for jump-starting a variety of vehicles. With 4400 peak amps, 500 cranking amps and 415 cold cranking amps, this jump starter is capable of starting even the most stubborn engines.

In addition to its impressive power, this jump starter also features two 22 Ah professional grade high output AGM batteries that act as an additional portable power source. This means that you can use it to power other devices, making it a great tool to have on hand during emergencies or outdoor activities.

The jump starter also includes a 12 Volt DC power outlet, which allows you to power devices that require a DC power source. And with its built-in, automatic charger, you can easily recharge the jump starter between uses, ensuring that it's always ready to go when you need it.

One of the standout features of this jump starter is its heavy duty clamps, which have replaceable copper jaws. This means that even if the clamps become damaged or worn over time, you can simply replace the jaws rather than having to purchase an entirely new jump starter.

6. Type S Projump Portable Power Bank & Jump Starter.

The TYPE S 12V 9.0L ProJump Battery Jump Starter is a must-have for every vehicle to avoid the inconvenience of being stranded on the road with a dead battery. This battery jump starter is portable and powerful, with 900 amps of power that can quickly and easily revive gas engines up to 9.0L and diesel engines up to 6.0L.

The integrated LCD provides step-by-step instructions for easy jump-starting of your vehicle, with multiple languages available for user convenience. This feature ensures that even those who are not familiar with jump-starting a vehicle can do it effortlessly.

In addition to jump-starting your vehicle, this battery jump starter also serves as a 45W laptop power bank. The 26,000 mAh lithium battery charger has a fast-charging 45W USB-C port, 18W micro-USB port, and two 18W USB-A ports, which can charge laptops like the MacBook Pro 13” and Dell XPS 13.

The TYPE S 12V 9.0L ProJump Battery Jump Starter is also equipped with an emergency LED flashlight and lantern for when you need it the most. The integrated LED lantern and flashlight come with strobe and emergency modes, which can be useful in different situations.

7. Autowit Jump: Portable Supercapacitor Starter Kit

Introducing SuperCap 2, the heavy-duty supercap jump starter that boasts superior technology and a longer lifespan than traditional battery car jump starters. With built-in supercapacitors, this device never requires regular charging, making it a reliable and convenient option for emergency situations.

SuperCap 2 is designed with ultrasafe protection features, ensuring users are protected from risks such as reverse polarity charging, overcurrent, overload, and overvoltage. This jump starter is physically active, guarding against sparks or explosions. With its four charging methods, SuperCap 2 can be charged in just a few minutes, making it an emergency life-saver in extreme weather conditions, whether it be blizzards or extremely hot weather.

With a powerful 12-volt current, SuperCap 2 can start the majority of gasoline engines and diesel engines up to 4.0L in just a few minutes. This jump starter is versatile and can be used to start cars, tractors, motorcycles, RVs, pickups, weeders, snowmobiles, and more. Its unique supercapacitor technology makes it easier to use and ensures a longer lifespan than traditional battery car jump starters, boasting over 100,000 uses under normal conditions.

SuperCap 2 is built to withstand extreme environments, functioning at temperatures as low as -40°C or as high as 70°C. Its durable construction ensures it can be used again and again without any decrease in performance.

Customer satisfaction is a top priority, and the manufacturer stands behind their product with a 100% satisfaction guarantee. In the unlikely event of any issues, they offer a free return/replacement policy to protect each buyer's rights.

8. Supersafe Car Jump Starter & Portable Power Bank

The GOOLOO GP4000 Portable Car Battery Jump Starter is a robust and reliable device that can quickly jump-start a dead car battery, making it an essential tool for drivers. Equipped with a powerful 4000 amp jump starter battery pack, this device can jump-start all gasoline engines and diesel engines up to 10.0L in just a few minutes, including 12v vehicles, motorcycles, pickup trucks, RVs, tractors, trucks, cargo vans, ATVs, snowmobiles, yachts, and many more.

One of the standout features of this jump starter is its high capacity portable charger. It comes with dual USB charging output ports, one of which supports fast charging, and a USB Type-C charging port (5V/3A). This means that you can use it to charge other devices or recharge the Jump Starter itself. It can be taken anywhere and can quickly charge numerous portable devices, such as smartphones, tablets, cameras, GPS systems, and more.

In emergency situations, the GOOLOO GP4000 Portable Car Battery Jump Starter can be a real lifesaver. It can jump-start vehicles in a matter of seconds, ensuring that you are not stranded and unsafe for longer than necessary. A full charge can boost most vehicles over 60 times!

Safety is a top priority for GOOLOO, which is why this battery jump starter is built with 10 types of protection to ensure the user's safety. The Smart Jumper Cables are constructed with all-metal clamps to prevent damage caused by long-term use, and there is no need to worry about misuse or sparks. The rugged design features hardened plastic and rubber corners that make sure the starter can withstand drops without any problem. A built-in flashlight can also assist you in vehicle emergencies at night.

The GOOLOO GP4000 Portable Car Battery Jump Starter comes with a range of accessories, including a Smart Jumper Cable, USB to Type-C Cable, EVA Storage Case, User Manual, 18 Months Warranty, and Lifetime Tech Support. It is an excellent choice for drivers who want a reliable, powerful, and versatile device that can jump-start their car battery and charge their portable devices on the go. It is also an ideal gift for Father's Day.

9. Hulkman Alpha100 Jump Starter – Power Your Ride!

The Alpha 100 is a high-performance car battery jump starter that is designed to handle even the toughest dead battery situations. It boasts a peak current of 4000A, capable of jump-starting up to 80 cars on a single charge.

What sets the Alpha 100 apart from other jump starters is its unique Pre-Heat Tech, which significantly enhances battery performance in freezing temperatures, allowing it to operate at temperatures as low as -40℉. This technology is unmatched by any other jump starter on the market.

In addition, the Alpha 100 has a faster 65W PD charging capability, which can power up a MacBook from 0% to 100% in less than 2 hours using a USB-C to USB-C cable. It can also fully charge the jump starter in less than 1.5 hours. With just 20% of its power, it can jump-start a car if needed.

But the Alpha 100 is more than just a jump starter. It also functions as a 32000mAh battery bank, equipped with two USB-A ports and one USB-C PD65W port. Additionally, it has a 12-volt 10 amps port that can power any 12V DC devices, like tire inflators.

For outdoor adventures or emergency situations, the Alpha 100 comes with an ultra-bright LED light with three modes: flashlight, strobe light, and SOS light. Its rugged build is designed to withstand harsh environments and features an IP65 function that makes it rain-resistant, dust-tight, and drop-resistant.

Rest assured, the Alpha 100 is a reliable and versatile tool that will always have your back. In case any issues arise, the manufacturer provides customer support for your peace of mind.

10. Ultrasafe Lithium Jump Starter For Large Engines

Introducing the Boost Max Series – a line of powerful lithium jump starters designed to tackle the toughest engine starts. With over 5250-amps of starting power, this jump starter can handle gasoline and diesel engines up to 16-liters with ease.

Safety is key with the UltraSafe battery jump starter pack. With a mistake-proof design featuring spark-proof technology and reverse polarity protection, users can connect to any 12-volt battery worry-free.

This jump starter is commercial-grade and capable of jump-starting almost any type of vehicle or equipment, including semi-trucks up to class 8, motorhomes, coaches, buses, mining, agricultural, construction, and vocational equipment with 6, 8, 12, and 16 cylinders, and more. Users can also take advantage of the integrated digital battery voltmeter for enhanced diagnostics.

Despite its powerful capabilities, the Boost Max Series is incredibly portable. Its high discharge lithium technology makes it the most compact and lightweight design on the market, weighing in at a mere 15-pounds. Plus, its portable carrying case makes jump starting more convenient than ever.

The Boost Max Series is not just a lithium jump starter, but also a portable power bank for recharging smartphones, tablets, and other USB devices. And with its ultra-bright 600-lumen LED flashlight with seven light modes, including emergency strobe and SOS, users can stay prepared for any situation.

In the box, users will receive the GB250 12V UltraSafe Lithium Jump Starter Pack and Power Bank, XGC4 56W Power Adapter with Interchangeable 60-inch (1.5m) AC Cords for Australia (Type I), Europe (Type C), North America (Type A), and the United Kingdom (Type G) – XGC Kit, Max Protection EVA Case, and a 1-Year Limited Warranty.

Best Portable Battery Jump Starter FAQs

Can a portable battery jump starter charge other devices besides a car battery?

Yes, many portable battery jump starters come with additional features that allow them to charge other devices besides a car battery. These jump starters often have built-in USB ports or other charging ports that enable you to charge devices such as smartphones, tablets, and other small electronics. Some models even come with AC outlets that allow you to power larger devices like laptops.

It's important to note that the charging capabilities of a portable battery jump starter may vary depending on the model and brand. Some may have more powerful charging capabilities than others, so it's essential to check the specifications before purchasing to ensure it meets your charging needs. Additionally, it's important to make sure the jump starter is fully charged before using it to charge other devices to ensure optimal performance.

How long do the best portable battery jump starters hold their charge when not in use?

The duration for which the best portable battery jump starters hold their charge when not in use varies depending on the brand and model of the jump starter. However, most high-quality portable jump starters can hold their charge for up to a year when not in use. It is important to note that the battery life and charge retention of a jump starter can also be affected by factors such as storage temperature, frequency of use, and the overall quality of the battery. To ensure that your portable battery jump starter remains charged for a long period, you should store it in a cool and dry place and charge it at least once every few months. It's also essential to follow the manufacturer's instructions on proper storage and maintenance to extend the battery life and maximize its performance.

How long does a portable battery jump starter take to charge before use?

The charging time for a portable battery jump starter can vary depending on its capacity and the charging method used. Generally, most portable jump starters take around 2-4 hours to fully charge using a wall adapter, and up to 6-8 hours if charged via a car's cigarette lighter port. However, some high-capacity models may take longer to charge.

It's important to note that the charging time can also depend on the condition of the battery and the quality of the charging cable. If the battery is completely depleted, it may take longer to charge, and using a low-quality charging cable may affect the charging speed.

To ensure that your portable battery jump starter is ready to use when you need it, it's recommended to charge it fully after each use and to keep it charged at least once every three months if not in use.

How many times can a portable battery jump starter jump-start a car on a single charge?

The number of times a portable battery jump starter can jump-start a car on a single charge depends on several factors, such as the battery capacity of the jump starter, the size of the car battery, and the condition of the car battery. Typically, a portable jump starter with a battery capacity of 10,000mAh can jump-start a small car with a 2.0L engine up to 3-5 times on a single charge. However, larger cars with bigger engines may require more power and therefore reduce the number of times the jump starter can be used on a single charge. It's important to note that the age and condition of the car battery also affect the number of times a jump starter can be used on a single charge. As a general rule, it's always a good idea to fully charge the jump starter before using it and to follow the manufacturer's recommendations for usage.

What are the top-rated portable battery jump starters on the market?

There are several top-rated portable battery jump starters available in the market. One of the most popular and highly rated jump starters is the NOCO Boost Plus GB40. It is a compact and lightweight device that can jump-start up to 6-liter gasoline engines and 3-liter diesel engines. It also comes with a USB port to charge your mobile devices.

Another excellent option is the TACKLIFE T8 MAX jump starter. It is a powerful device capable of jump-starting up to 7-liter gasoline engines and 5.5-liter diesel engines. It also has a built-in LED flashlight and USB ports to charge your devices.

The DBPOWER 800A Peak 18000mAh Portable Car Jump Starter is another top-rated jump starter that is compact and lightweight. It can jump-start up to 7.2-liter gasoline engines and 5.5-liter diesel engines. It also has a built-in compass and LED flashlight.

Lastly, the Schumacher DSR114 DSR ProSeries 4400 Peak Amps Jump Starter is a heavy-duty option that can jump-start even the largest engines. It has a 22 Ah professional-grade battery and can jump-start up to 8-liter gasoline engines and 6-liter diesel engines. It also has a built-in air compressor and USB ports for charging devices.

What features should I look for in a portable battery jump starter?

When looking for a portable battery jump starter, there are several features that you should consider to ensure you get the best product for your needs. Here are some key features to look for:

1. Capacity: The capacity of the battery will determine how many times you can use it to jump-start your vehicle. Look for a model with a high capacity of at least 10,000mAh.

2. Compatibility: Make sure the jump starter is compatible with your vehicle's engine size and type. Some models are only suitable for smaller engines, while others can handle larger ones.

3. Safety features: Look for a jump starter with built-in safety features such as overcharge protection, short-circuit protection, and reverse polarity protection to prevent damage to your vehicle or the jump starter.

4. Portability: Choose a jump starter that is lightweight and easy to carry around. Some models come with a carrying case or handle for easy transport.

5. Additional features: Some jump starters come with additional features such as built-in flashlights, USB ports for charging other devices, and air compressors for inflating tires.

By considering these features, you can find a portable battery jump starter that is reliable, safe, and convenient for your needs.

What is the maximum cold cranking amps (CCA) of the best battery jump starters?

The maximum cold cranking amps (CCA) of the best battery jump starters can vary depending on the specific model and brand. Generally, the top-rated battery jump starters have a CCA rating of at least 1000 amps, which is enough power to jump-start most vehicles, including SUVs, trucks, and cars. However, some premium models have a CCA rating of up to 2000 amps, which is suitable for heavy-duty trucks and machinery. It's important to note that the CCA is not the only factor to consider while purchasing a battery jump starter. Other factors like safety features, portability, ease of use, and warranty are also important to ensure that you get the best value for your money.

What is the price range for the best portable battery jump starters?

The price range for the best portable battery jump starters varies depending on the brand, model, and features. Generally, a good quality portable jump starter can cost anywhere from $50 to $200. You can find some basic models that are priced around $50, which can provide enough power to start most standard vehicles. On the other hand, if you are looking for a more powerful jump starter with additional features such as air compressors, USB ports, and LED lights, you can expect to pay around $100 to $200. It is important to note that the price should not be the only factor when choosing a jump starter. You should also consider the battery capacity, voltage, safety features, and overall quality of the product before making a purchase.

What is the weight and size of the best portable battery jump starters?

The weight and size of the best portable battery jump starters vary depending on the model and brand. Generally, portable jump starters are compact and lightweight, making them easy to carry and store in your vehicle. Some of the best portable jump starters weigh between 1-3 pounds and have dimensions of approximately 6 x 3 x 1 inches. However, larger models may weigh up to 10 pounds and have dimensions of around 10 x 10 x 5 inches. It's important to note that the weight and size of a portable jump starter doesn't necessarily reflect its performance. When selecting a portable battery jump starter, it's essential to consider its power capacity, peak amps, and compatibility with your vehicle. It's recommended to opt for a jump starter with at least 1000 peak amps and compatibility with your vehicle's engine size for optimal performance.

What safety features are included in the best portable battery jump starters?

The best portable battery jump starters come with a range of safety features to prevent any potential damage or safety hazards. Some of the most important safety features that are included in the best battery jump starters are as follows:

1. Reverse Polarity Protection: This feature prevents the user from connecting the battery jump starter to the battery in the wrong way, which can cause damage to the vehicle’s electrical system.

2. Short Circuit Protection: This safety feature prevents the battery jump starter from delivering too much power to the vehicle’s electrical system, which can cause a short circuit.

3. Overcharge Protection: This feature ensures that the battery jump starter doesn’t overcharge the vehicle’s battery, which can cause damage to the battery or even an explosion.

4. Spark-Proof Clamps: These clamps prevent any accidental sparks from occurring while connecting the battery jump starter to the vehicle's battery.

5. Built-in Flashlight: A built-in flashlight is also a safety feature that comes in handy when jump-starting a vehicle in low light conditions.

Overall, the safety features in the best portable battery jump starters are designed to protect both the user and the vehicle, making them a reliable and safe option for jump-starting a dead battery.

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