Top 8 Best Portable Jump Starter for Diesel Trucks

The best portable jump starter for diesel trucks is a small, battery-powered device that can be used to jump-start a dead battery of trucks. As a result, they typically are much smaller and lighter than traditional jump boxes, which means they're easily stored and transported. 

Diesel trucks have the advantage of being highly durable and powerful. However, they can be more difficult to start as compared to gas-powered vehicles. In case your battery dies on your diesel truck, it is a good idea to have a portable jump starter on hand in case you need to jumpstart it.

How Many Amps are Needed to Jump-Start a Truck?

It is common to require 400 to 600 amps for a small truck with a 4-cylinder engine, while a large truck with a V8 engine may require 700 or more amps. As well as the number of amps needed, the cold cranking amp rating of the battery is also a factor. CCA is the amount of amps that an engine can be started with in a short period of time using a battery in cold weather. It is a measure of the battery's ability to provide power for a short period of time.

Here is a general rule of thumb for how many amps are needed to jump-start a truck:

  • Small truck with a 4-cylinder engine: 400-600 amps
  • Mid-size truck with a V6 engine: 500-700 amps
  • Large truck with a V8 engine: 700-2000 amps

If you are not sure how many amps your truck needs, it is always best to consult your manual.

Best Portable Jump Starter for Diesel Trucks-Our Top 8 Picks


1-NOCO Boost HD GB70 2000A Jump Starter

“Best for 6.0L and 8.0L Diesel Engines”

You can use the NOCO Boost HD GB70 for gasoline and diesel engines up to 6.0L and 8.0L, respectively. You can also use it as a portable power bank to charge your smartphone, tablet, and other USB devices, or as an LED flashlight with seven light modes, including SOS and emergency strobe. 

Best Portable Jump Starter for Diesel Trucks

You can count on the NOCO Boost HD GB70 to come through, regardless of the weather. It works efficiently from -4°F to +122°F, so it will stand up to winter's bitter cold or summer's scorching heat.

With its patented UltraSafe design, the GB70 is safe for everyone, even if you have never used a jump starter before. Spark-proof technology and reverse polarity protection keep sparks from happening and vehicle damage. 

Specifications

  • Peak Output Current: 2000A
  • Voltage: 12V
  • Battery Capacity: 2000Ah
  • IP Rating: IP65 (with ports closed)
  • Flashlight: 400 lumens
  • Warranty: 1-year limited warranty
  • Item Weight: 5 pounds

Read more about Best Car Jump Starter with an AC Outlet

Features of NOCO Boost HD GB70 2000A Jump Starter

  • As it comes with Powerful 2000 Amp rating so you can use it on all vehicle types except industrial machinery i.e lifters, cranes.
  • Its Portable USB Power Bank Functionality allows you to charge your gadgets on the go.
  • Moreover, its versatile 7-Mode LED Flashlight makes it easy to work in dim-light conditions.
  • The Compact and UltraSafe Design makes it portable enough so Users can carry it safely.
  • Its enhanced waterproofing makes NOCO jumpstarter our #1 pick. 
  • Last but not the least, all-Weather Performance from -4°F to +122°F gives users a boost to work in every condition.
Pros
  • Versatile Power Bank
  • Easy to use
  • All-Weather Reliability
  • UltraSafe Technology
Cons
  • A bit Expensive

Why Do We Choose This?

You can use it to revive dead batteries if they're dead, ensuring you're never left stranded because it's dependable, high-performance. On a single charge, it can perform up to 40 jump starts, which means you can use it quite frequently. You can use it for a gasoline engine up to 8.0 liters or a diesel engine up to 6.0 liters.


2-AUTOGEN Portable Car Jump Starter

“Best for All Gasoline and 9.5L Diesel Engines”

This portable power starter has a Smart Power Air Compressor, which makes it stand out. With 150 PSI and 45L, this turbocharged marvel is impressive. It's got precision-you can set different pressures and pressure units, so your tires and sports balls will be inflated fast and accurately. With this feature, you can adjust tire pressure for a smooth ride or inflate sports equipment for a day of fun.

Best budget friendly jump starter

During low-light conditions or emergencies, the LED flashlight comes in handy. There are four white light modes (lighting, flashing, warning) and an SOS red warning mode for any situation.

It has a 27000mAh capacity, so you can power up all sorts of stuff. You can charge smartphones, tablets, and other USB-enabled devices with its two USB ports. You can also power car devices with a 12V and 10A DC output. When you need power, you're never left without it. The power management system incorporates multiple safety features to keep you and your car safe.

Specifications

  • Peak Output Current: 4000A
  • Voltage: 12V
  • Battery Capacity: 27000mAh
  • IP Rating: IPX5
  • Flashlight: 4 white light modes + 1 red warning mode
  • Warranty: 18-month warranty
  • Item Weight: 1.8 Kg 

Read more about Best Small Jump Starter for Quick Starts

Features of AUTOGEN Portable Car Jump Starter

  • It provides a remarkable peak current of up to 4000A and offers a substantial high capacity of 27000mAh.
  • It's universally compatible with 12 V vehicles, including cars, trucks, motorcycles, boats, and RVs.
  • It can efficiently inflate tires, balls, and various other inflatables to your desired pressure level.
  • It serves as a reliable source of bright light, making it suitable for both work and emergency situations.
  • As it comes equipped with built-in protection, it features to guard against over-current, over-charging, and reverse polarity.
Pros
  • 4000A Peak High Power
  • Budget Friendly
  • Multifunctional Charger
  • Reverse polarity protection
Cons
  • Extra features can make it appear bulkier

Why Do We Choose This?

A peak current of 4000A and a large 27000mAh battery make it more than capable of handling even the toughest situations. You can use this jump starter to start anything from a compact car to a robust 9.5L diesel. All 12V vehicles can use it, so it's perfect for car owners, truck drivers, motorcycle enthusiasts, boat operators, RV adventurers, etc.


3-TOPDON 3000A Battery Booster Jump Starter

“Best for 9L Gas & 7L Diesel Engines”

The clamps are 100% copper, the cables are heavy-duty, and the enclosure is IP54 fireproof. A flexible stand and an extendable hook make it perfect for camping or work. In addition to 10 smart protection technologies, it keeps everyone safe.

Aside from being a jump starter, the JS3000 is also a 24000mAh portable power bank with multiple USB ports and Type-C PD45W bi-directional charging. Also, the flashlight has 400 lumens and an SOS signal light for emergencies. When fully charged, it lasts up to 30 hours.

With boost function, TOPDON's JS3000 jump starter can resurrect dead or damaged batteries. If you press and hold the BOOST Button, your vehicle will start in 30 seconds. It works on trucks, boats, motorcycles, and more.

Specifications

  • Peak Output Current: 3000A
  • Voltage: 12V
  • Battery Capacity: 24000mAh
  • IP Rating: IP54
  • Flashlight: 400 lumens + SOS signal light
  • Warranty: 2-year warranty
  • Item Weight: 2.24 kg

Features of TOPDON 3000A Battery Booster Jump Starter

  • This powerful device offers a peak current of 3000A, with a brief burst of 750A for 2 seconds.
  • It is equipped with a substantial 24000mAh battery capacity, and can perform up to 45 jump starts on a single charge.
  • Additionally, it doubles as a portable power bank, featuring 2 USB QC 3.0 ports, a 16.8V DC port, and a Type-C PD45W port for versatile device charging.
  • It has the inclusion of 10 intelligent protection technologies to safeguard against various electrical issues.
Pros
  • Safe to use even for beginners
  • Up to 45 jumps start on a single charge
  • Multiple device charging options
  • intelligent protection technologies
Cons
  • Does not come with an air compressor

Why Do We Choose This?

JS3000 can handle 3000A peak, with 750A available for 2 seconds. Because of its power, nearly all 12V lead-acid batteries come back to life within a second. The JS3000 can handle anything from a powerful 9.0L Gas or 7.0L Diesel engine to a modest motorcycle, speedboat, or even an ATV. It fits trucks, boats, pickups, lawnmowers, SUVs, off-roaders, sedans, jet skis, and more. You can get 45 jump starts with a full charge, so it's a dependable companion.


4-GOOLOO GP4000 Jump Starter

“Best for Portable Power Bank with USB Quick Charge”

The 4000 amp battery can resurrect a dead car battery in just minutes, including gasoline and diesel engines up to 10.0L. And it works on 12V cars, motorcycles, pickup trucks, RVs, tractors, cargo vans, ATVs, snowmobiles, and yachts.

Best Portable Jump Starter for Diesel Trucks

This jump starter has 10 different types of protection to keep you from sparking or misusing it. All-metal clamps ensure long-term durability of Smart Jumper Cables. Its tough design, reinforced with sturdy plastic and rubber corners, keeps it from breaking. During vehicle emergencies, especially at night, the flashlight comes in handy.

It's also dustproof, waterproof, and water resistant, so it's perfect no matter where you are. Lightweight and compact, the GB70 recharges from any USB port in just 6 hours.

Specifications

  • Peak Output Current: 4000 amps
  • Voltage: 12V
  • Battery Capacity: 20000 mAh
  • IP Rating: IP65
  • Flashlight: Three modes (steady, SOS, and strobe)
  • Warranty: 12 months
  • Item Weight: 1.8 kg

Features of GOOLOO GP4000 Jump Starter

  • Featuring an impressive 4000 amp peak current, it is a powerhouse for jump-starting vehicles.
  • It's capable of jump-starting even the most robust engines, with compatibility extending up to 10.0L for gasoline and 8.0L for diesel.
  • Equipped with a substantial 20000mAh battery capacity, it can perform an astonishing 60 jump starts on a single charge.
  • The heavy-duty clamps come with 10 types of protection to ensure safety and reliability during use.
  • The rugged 12V Car Jump Starter also includes a built-in flashlight.
Pros
  • Can start even the most dead batteries
  • Can be used to charge smartphones
  • Works for engines up to 10.0L
  • Slightly high power
Cons
  • Can only be used to start a car about 60 times on a single charge

Why Do We Choose This?

The GOOLOO GP4000 does more than jump start. The power bank also has dual USB charging output ports, including one that supports fast charging. This lets you charge smartphones, tablets, cameras, GPS systems, and more quickly. GP4000 is a great emergency and everyday power source thanks to its versatility.


5-VTOMAN X7 Jump Starter with Air Compressor

“Best for 160PSI Digital Tire Inflator”

VTOMAN X7 features a 5.1-inch touchscreen that displays crucial data at a glance. You can easily get information about the battery level, inflator mode, and tire pressure in real-time.

Portable jump starter for trucks

You can start your car even in extreme environments like -4°F to 140°F with the VTOMAN X7 thanks to its smart chip. The X7 has ten safety protection technologies, including safeguards against overcharge, overcurrent, short circuits, and more. Additionally, the honeycomb heat dissipation design increases heat dissipation by 30%, which boosts both safety and product lifespan.

With the VTOMAN X7, you get more than just a jump starter. You can use it as a jump box, power bank, tire inflator, LED flashlight, and it's 18W Type-C fast charging. Adding to its practicality, it inflates tires in just ten minutes. There are four lighting modes with the 400-lumen LED light: constant white lighting, constant red lighting, flash, and SOS.

Specifications

  • Peak Output Current: 4250 amps
  • Voltage: 12V
  • Battery Capacity: 26800 mAh
  • IP Rating: IP67
  • Flashlight: 4 modes
  • Warranty: 18 months
  • Item Weight: 4.85 pounds

Features of VTOMAN X7 Jump Starter with Air Compressor

  • It's a versatile 160PSI digital tire inflator with a range of features.
  • The 5.1-inch smart screen provides real-time tire pressure monitoring.
  • With 10 built-in safety protection technologies for tire inflation and other operations.
  • Its upgraded thermal design enhances heat dissipation, contributing to its durability and performance.
Pros
  • Can inflate tires quickly and easily
  • Displays real-time tire pressure
  • Adjusts tire pressure.
  • Compact and durable
Cons
  • The air compressor can be loud when in use

Why Do We Choose This?

A smart digital tire inflator sets the VTOMAN X7 apart. With its 5.1-inch smart screen and tire pressure detection functionality, you can effortlessly monitor and adjust the inflation mode during the pumping process. Supporting three optional units (PSI, BAR, KPA), the X7 ensures that your tires are properly inflated, enhancing safety and efficiency. The 160PSI compressor inflates a typical car tire to 20 PSI in just 2 minutes, making it a great tool for maintaining tire pressure during long trips.


6-YESPER Car Jump Starter

“Best for 100W Fast Charging”

A big advantage of YESPER is that it can start a completely dead car without assistance, giving you a safety net in case your car doesn't start. The battery jump starter increases voltage by 30% via innovative battery structure reassembly and microcomputer control. It delivers consistent cranking current of up to 3000A. Aside from that, the Intelligent Temperature Control Tech ensures a safer, faster, and more reliable start.

Best Portable Jump Starter for Diesel Trucks

It has a 20000mAh battery, so you can charge your phones, tablets, and other USB devices.The 15V portable power source can also power all 12V DC devices, including tire inflators and inverters, giving you a one-stop solution.

In addition, the 400 lumen LED light has three modes: constant white, strobe, and SOS. This portable jump starter is also waterproof, dustproof, and drop-proof, thanks to its IP65-rated case.

Specifications

  • Peak Output Current: 3000 amps
  • Voltage: 12V
  • Battery Capacity: 20000 mAh
  • IP Rating: IP65
  • Flashlight: three modes (steady, SOS, and strobe)
  • Warranty: 18 months
  • Item Weight: 2.6 pounds

Features of YESPER Car Jump Starter

  • It starts with engines up to 10.0L for gasoline and 8.0L for diesel.
  • Robust 20000mAh battery capacity can perform an astonishing 60 jump starts on a single charge.
  • The PD100W USB-C fast charging ensures rapid and convenient recharging.
  • The 3.2-inch easy-to-read screen provides clear and user-friendly information for quick and efficient operation.
  • Its powerful 400 lumens LED light offers three distinct modes.
  • The IP65-rated sturdy and durable case is built to withstand challenging conditions.
Pros
  • Can be fully charged in 45 minutes
  • IP65-rated case
  • Displays battery information
  • Built in user friendly
Cons
  • Included carrying case is bulky

Why Do We Choose This?

YESPER's jump starter battery pack brings a unique advantage to the table with its PD100W USB-C fast charging capability. You can charge it from 0% to 100% in 45 minutes, so you're always prepared. Even if you forget to recharge the battery jumper before heading out, just 5 minutes of charging are sufficient to start your car. This feature shows YESPER's commitment to convenience and efficiency.


7-SUNPOW Lithium Jump Starter

“Best for LCD Screen & LED Light”

A 20000mAh battery and 2000A peak power redefine reliability with the SUNPOW Car Jump Starter. You can start a wide variety of 12V vehicles with this battery, including gas engines, 8.5L diesel engines, lawnmowers, snowmobiles, motorcycles, yachts, and more. A full recharge takes only four to five hours.

Best Portable Jump Starter for Diesel Trucks

In addition to a Type-C port and dual USB ports, you'll also find a quick charge 3.0 port on SUNPOW's jump starter. If you need power for your phone, camera, tablet, or other compatible devices, you can count on SUNPOW.

You can't go wrong with SUNPOW's jump starter. Comprehensive protection is provided by advanced intelligent technology. It includes safeguards against sparks, overcharges, short circuits, overloads, overvoltages, reverse polarity, high temperatures, low temperatures, and more. In extreme weather conditions, SUNPOW's jump starters perform reliably, even at -4°F to 140°F.

Specifications

  • Peak Output Current: 2000 amps
  • Voltage: 12V
  • Battery Capacity: 20000 mAh
  • IP Rating: IP65
  • Flashlight: LED flashlight with 3 modes (steady, SOS, and strobe)
  • Warranty: 18 months
  • Item Weight: 2 pounds

Features of SUNPOW Lithium Jump Starter

  • It gives 2000A peak current and a substantial 20000mAh battery capacity.
  • It's capable of performing up to 35 jump starts on a single charge.
  • It has Type-C input 15W port and dual USB ports for quick charge 3.0 support.
  • The advanced intelligent technology ensures safe and dependable operation.
  • Additionally, it comes with a built-in LED flashlight featuring three modes for functionality and usefulness in various situations.
Pros
  • Can last a long time between charges
  • Four to five hours for a full recharge
  • Safe to use
  • Usefulness in various situations
Cons
  • The carrying case is bulky

Why Do We Choose This?

The SUNPOW jump starter is versatile and offers tons of features. There's an audible alert when it's being used incorrectly, ensuring safety. It also has a built-in LED flashlight with three modes: flashlight, strobe, and SOS. You can plan your usage effectively with the digital LCD screen's clear and concise power info. There's also a 10A DC port for powering other car accessories, and a cigarette lighter adapter is included for your convenience.


8-BUTURE Portable Car Jump Starter

“Best for Smart Cordless Inflator with LCD Display”

This powerful 2500A charger can start 12V dead cars in seconds, even in extreme conditions like -20°C to 60°C, even in extreme temperature conditions. It's powerful and can be recharged over 1000 times.

portable jump starter for easy usage

It combines five useful features into one compact device. You can jump start cars, blow air, provide long-lasting lighting, provide SOS for emergencies, and use this jump starter as a portable power bank to charge multiple USB devices at once.

The start-up temperature is reduced by 30% thanks to subversive innovations in assembly structure and honeycomb thermal design. This jump starter is high-temperature resistant, and the extended cables reach a variety of battery terminals, making it flexible. You'll see alerts for ten auto protections to prevent improper operation.

Specifications

  • Peak Output Current: 2500 amps
  • Voltage: 12V
  • Battery Capacity: 2500 Amps
  • IP Rating: IP67
  • Flashlight: 4 modes (steady, SOS, flash, and strobe)
  • Warranty: 24 months
  • Item Weight: 3.16 pounds

Features of BUTURE Portable Car Jump Starter

  • With over 1000 recharge cycles, it offers long-lasting performance and durability.
  • It's a multi-functional tool, serving as a jump starter, air compressor, flashlight, SOS signal, and power bank.
  • Safety is paramount, thanks to its 10 intelligent protection technologies.
  • Housed in a sturdy case, it's built to withstand tough conditions, and it comes with extended cables for added convenience.
  • It provides efficient and worry-free operation, and its air compressor boasts a flow rate of 35L/Min (150 PSI) that can last for 25 minutes.
Pros
  • 10 intelligent protection technologies
  • Starts dead cars quickly
  • Operates from -20°C to 60°C
  • Built to withstand tough conditions
Cons
  • The LCD display is on the air compressor, not on the jump starter itself

Why Do We Choose This?

A smart cordless inflator makes this jump starter hassle-free and efficient. Its turbocharged capability delivers 35L min (150 PSI) airflow, lasting up to 25 minutes. You can inflate anything from tires to balls with this. A detachable extended air hose and three switching modes make it easy to use. The LCD display and versatile functionality make this jump starter a dependable companion.


Buying Guide for Best Portable Jump Starter for Diesel Trucks

There is no doubt that jump-starting a diesel truck can be a challenging task, especially when you find yourself in the middle of nowhere with a dead battery. That is when a portable jump starter for diesel trucks comes in handy. 

We will go over the essential factors to consider when purchasing the best portable jump starter for diesel trucks in this buying guide, ensuring you are always prepared in case your battery suddenly fails.

Battery Capacity Matters

It is imperative to have a large battery capacity when it comes to jump-starting a diesel engine. If you are buying a portable jump starter, look for a jump starter with a high ampere-hour (Ah) rating. It is recommended to have a capacity of at least 2000Ah in order to crank the engine effectively on diesel trucks.

Peak Current Output

As a rule of thumb, the peak current output of a jump starter is the maximum amount of current that it can deliver for a short period of time in order to start an engine. 

Portable jump starter for quick start

If you own a diesel truck, you'll need a jump starter with a peak current output that exceeds 1000 amps to kick start your engine. As a result, you will have enough power to start your diesel engine despite the cold weather conditions.

Battery Type

A portable jump starter typically uses lithium-ion batteries that are known for their high energy density and long life cycles. However, not all lithium-ion batteries are created equal. 

You should look for a jump starter that utilizes lithium-iron phosphate (LiFePO4) batteries because they are more stable, have a longer life cycle, and are less prone to overheating or explosion than other lithium-ion batteries.

In order to pick the right jump starter, you must make sure that it is portable and lightweight. Choose a jump starter that is lightweight so that you can easily place it in your car. A smaller jump starter is more convenient to store and transport, making it a practical choice for on-the-go use.

Safety Features

The safety of your vehicle should be one of the most important factors you should consider when selecting a portable jump starter. Look for safety features such as overcharging protection, short circuit protection, reverse polarity protection, and spark protection. In addition to protecting your vehicle, these features also ensure your safety while you are jumping start your vehicle.

You will find that some jump starters come with a built-in air compressor, which makes them a highly useful addition. This allows you to inflate your tires in case of a flat or low pressure situation, which is of course an added benefit.

Additional Features

There are a number of additional features that can enhance the experience of using a jump starter. These include USB ports for charging devices, a flashlight built into the unit in case of an emergency, and a digital display for monitoring the battery capacity.

In order to ensure that your jump starter can withstand rough handling or extreme weather conditions, make sure that it is constructed with a rugged and durable design that can withstand such conditions. Outdoor enthusiasts would especially benefit from a jump starter that is water-resistant or waterproof.

Cold Cranking Amps (CCA)

In order for the best portable jump starter for diesel trucks to perform reliably in adverse conditions, its Cold Cranking Amps (CCA) rating must be high to ensure reliable performance. Diesel trucks can be particularly difficult to start in cold weather, so make sure you select a jump starter with a high CCA rating to ensure reliable performance.

Price and Warranty

Choosing the right jump starter is important, but don't compromise quality just for a lower price. Look for a jump starter that offers a good balance between features, performance, and price. Make sure you check for a manufacturer's warranty as well to protect your investment in case of malfunctions or defects.

In order to make sure that you buy the right jump starter, we recommend that you read customer reviews and seek recommendations from other diesel truck owners. These real-world experiences can provide useful insights into the performance and reliability of a particular jump starter.


How to Use a Portable Jump Starter

To use the best portable jump starter for diesel trucks, follow these steps:

Step 1: Turn Off the Jump Starter

Before you begin, ensure that the portable jump starter is turned off. This precaution helps prevent any accidental sparks during the connection process.

Take the red clamp (positive) from the jump starter's cables and securely attach it to the positive terminal of the dead battery. The positive terminal is usually marked with a "+” sign or the color red.

Step 2: Connect the Black Clamp

Next, take the black clamp (negative) and connect it to the negative terminal of the dead battery. The negative terminal is typically marked with a "-” sign or is colored black.

how to use portable jump starter

Now, turn on the portable jump starter. Many models have a power button or switch that you'll need to activate. Once it's on, the jump starter will begin sending power to the dead battery.

Step 3: Charging the Battery

Allow the jump starter to charge the dead battery for a few minutes. This step is crucial as it transfers power from the jump starter to the vehicle's battery, giving it the energy needed to start.

After a few minutes of charging, attempt to start your vehicle. Turn the ignition key as you normally would. If the engine starts successfully, congratulations! You've jump-started your vehicle.

Step 4: If the Car Doesn't Start

If the vehicle does not start on the first attempt, don't panic. Allow the jump starter to continue charging the battery for a few more minutes. Sometimes, a severely depleted battery needs extra time to build up enough charge to start the engine.

After giving it some additional time to charge, make another attempt to start the car. Be patient, as it may take a couple of tries to get the engine running.

Step 5: Remove the Clamps

Once your vehicle starts, turn off the jump starter and disconnect the clamps in the reverse order of how you connected them. Start by removing the black (negative) clamp from the previously dead battery's negative terminal, followed by the red (positive) clamp from the positive terminal.

After successfully jump-starting your vehicle, turn off the portable jump starter and store it safely in your vehicle. It's always a good idea to keep it charged and ready for any future emergencies.


FAQs About Portable Jump Starter for Diesel Trucks

How many amps do you need to jumpstart a diesel truck?

You will need a jump starter with a peak amp rating of at least 400 amps. If you are jump starting a large truck, you might need as much as 2000. If you are jump starting a diesel engine, you should make sure that the jump starter is powerful enough to do the job.

Can I use a jump starter on a diesel engine?

The answer is yes. A jump starter can be applied to a diesel engine. However, it is important to read the instructions carefully and make sure that the jump starter is powerful enough for the job. Make sure you use the right cables and follow the safety instructions provided.

How many amps is a diesel car battery?

To jump start a diesel car, it is usually necessary for the battery size to range from 50-100 Ah. Before using a jump starter, you should make sure the battery size really matches the battery size of your car. You should also ensure the battery voltage is correct before using a jump starter.


Still Confused? Let Wrap it up for you

For diesel trucks, you will need the best portable jump starter for diesel trucks with at least 400 to 600 amps. This is because diesel engines require more power to start than gas engines. You should also look for a jump starter with a battery capacity of at least 20000mAh. 

In addition to peak amps and battery capacity, you should also consider the number of safety features that a jump starter has. Some of the best portable jump starters for diesel trucks include the TOPDON 3000A Battery Booster Jump Starter, the GOOLOO GP4000 Jump Starter, and the VTONAM X7 Jump Starter with Air Compressor.