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BOOKOO A9 4000A 12V Jump Starter for Car Boat Lawnmower | 12L Gas - 10L Diesel Engines - Jumper Cables - Quick Charging USB Ports and USB C - 3 LED Modes and Storage Box
The 74WH portable lithium car battery jump starter pack can safely jump start a low battery in seconds with this compact powerful 2000A car starter, and rated for gasoline engines up to 8.0L and diesel engines up to 6.5L.
BOOKOO A9 4000A 12V Jump Starter for Car Boat Lawnmower | 12L Gas - 10L Diesel Engines - Jumper Cables - Quick Charging USB Ports and USB C - 3 LED Modes and Storage Box
Item #: 221977388

BOOKOO A9 4000A 12V Jump Starter for Car Boat Lawnmower | 12L Gas - 10L Diesel Engines - Jumper Cables - Quick Charging USB Ports and USB C - 3 LED

Item #: 221977388

WST 151

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The 74WH portable lithium car battery jump starter pack can safely jump start a low battery in seconds with this compact powerful 2000A car starter, and rated for gasoline engines up to 8.0L and diesel engines up to 6.5L.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

High Power Output
The 4000A jump starter can easily power 12L gas and 10L diesel engines, ensuring reliable and fast engine starts even in extreme conditions.
Multiple USB Ports
Equipped with quick charging USB ports and USB-C, it allows users to charge multiple devices simultaneously, enhancing the convenience for on-the-go power needs.
Portable Design
Compact and lightweight with a storage box, it offers easy transport and organization, making it perfect for car, boat, or lawnmower emergencies.

Product Details

Shop for the best 2000A battery jump starter on Ubuy Samoa. Get a powerful 12V auto jump starter with a 20000mAh capacity and QC 3.0 technology. Ideal for trucks up to 7.2L gas or 8L diesel.
  • 2000A peak current jump starter for 12V vehicles
  • 20000mAh power bank for charging electronic devices
  • Equipped with QC 3.0 technology for fast charging
  • Suitable for trucks with up to 7.2L gas or 6.5L diesel engines
  • Includes smart jumper cables for safe and easy usage
  • Ideal for emergency car battery boosting
Battery TypeLithium Polymer
Voltage12 volts
Compatible with Vehicle TypeATV, Bus, Lawn Mower, Passenger Car, RV, Snowmobile, Tractor, Truck, Van
Battery Capacity20000 milliamp_hours
Amperage4000 A
Peak Output Current4000 A
Automotive Fit TypeUniversal Fit
Item Dimensions D x W x H6.57"D x 3.15"W x 1.57"H (16.7 x 8 x 4 cm)
Item Weight1.9 pounds (860 grams)
Brand NameBooKoo
Manufacturer Part NumberJump starter A9
ManufacturerBOOKOO
UPC645716648698
Unit Count1 Count
Included ComponentsA9 Jump Starter, Hard Carrying Case, Jump Cables, USB C Cable, User Manual
Item Type NameCar Jump Starter,Car Battery Jump Starter Pack 1500A Peak Q10S for Up to 7.0L Gas and 5.5L Diesel Engine12V Auto Battery Booster,Jumper Cables,Portable Lithium Jump Box with LED Light/USB QC3.0
Model NumberA9
BrandBooKoo
Battery Cell CompositionLithium Polymer
Product Dimensions (L x W x H)6.57"D x 3.15"W x 1.57"H (16.7 x 8 x 4 cm)
Vehicle Service TypeATV, Bus, Lawn Mower, Passenger Car, RV, Snowmobile, Tractor, Truck, Van

Who Should Buy?

Suitable For
  • Car Owners

    Ideal for car owners who require a powerful jump starter for frequent battery issues, especially in emergencies.

  • Outdoor Enthusiasts

    Perfect for campers or boaters needing a reliable starter for outdoor equipment like lawnmowers and boats.

  • Multi-Device Users

    Useful for users who need to charge multiple devices quickly via USB ports during road trips or outages.

Not Suitable For
  • Lightweight Users

    Not suitable for users who require a compact or light jump starter due to its size and weight.

Product Description

BOOKOO A9 4000A 12V Jump Starter for Car Boat Lawnmower | 12L Gas - 10L Diesel Engines - Jumper Cables - Quick Charging USB Ports and USB C - 3 LED Modes and Storage Box

About This Item

Introducing the 2000A Battery Jump Starter - the ultimate solution for any emergency on the road. With a powerful 20000mAh battery capacity, this jump starter can jump-start your vehicle's dead battery in a matter of seconds, making sure you're never stranded again. Designed for versatility, this jump starter is compatible with trucks up to 7.2L gas and 8L diesel engines, making it perfect for a wide range of vehicles. Whether you're driving an SUV, a camper, a boat, or even a lawn mower, this jump starter has got you covered. Equipped with a QC 3.0 smart jumper cable, this jump starter ensures a secure and efficient jump-starting process.

It also doubles as a power bank, allowing you to charge your smartphone or other devices on the go. With USB ports conveniently located on the jump starter, you can easily charge your devices without the need for additional adapters. In addition to its power-packed performance, this jump starter is packed with safety features. It has built-in safety protection to prevent overcharging, over-discharging, and short circuits, giving you peace of mind while you're on the road. To make your life even easier, this jump starter comes with an integrated LED light.

Whether you're jump-starting your car in the dark or need extra light during a camping trip, the LED light has multiple modes to illuminate your surroundings. The 2000A Battery Jump Starter is portable and lightweight, making it easy to carry and store in your vehicle. Its compact design allows it to fit in your glove compartment or trunk, ensuring you have it on hand whenever you need it. Don't let a dead battery ruin your day. Get the 2000A Battery Jump Starter today and stay prepared for any roadside emergency.

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Customer Questions & Answers

  • Question: What types of engines can the BOOKOO Jump Starter support?

    Answer: The BOOKOO Jump Starter is designed to support a wide range of engines, specifically up to 8.0L gas and 6.5L diesel engines. This versatility makes it suitable not only for cars but also for boats and lawnmowers. It's equipped with robust power outputs, allowing it to jump-start vehicles quickly and effectively, which is essential during emergencies. Whether you have a standard car battery or need to kickstart a larger engine, this jump starter is capable of handling the task with ease.
  • Question: How does the USB 3.0 fast charging feature work?

    Answer: The USB 3.0 fast charging feature allows you to efficiently charge your devices while on the go. This jump starter includes a USB output that provides rapid charging for smartphones, tablets, and other USB-powered devices. This is particularly beneficial during outdoor activities where power sources are limited. Simply connect your device to the jump starter's USB port, and it will charge quickly, ensuring your devices remain functional for longer periods.
  • Question: What comes in the package with the BOOKOO Jump Starter?

    Answer: The package includes the BOOKOO Jump Starter unit, jumper cables for easy connectivity to your vehicle's battery, a wall charger for recharging the unit, and a user manual for easy reference. The included cables are designed to be durable, ensuring a secure connection for jump-starting. This comprehensive package ensures you have everything you need to get started quickly and safely, making it an all-in-one solution for battery emergencies.
  • Question: Are there safety features built into the BOOKOO Jump Starter?

    Answer: Yes, safety is a priority with the BOOKOO Jump Starter. It is equipped with multiple built-in safety features, including over-current protection, short-circuit protection, and overload protection. These features ensure that both the device and your vehicle's battery are protected during use. The jump starter’s design caters to user safety, allowing anyone, regardless of experience level, to safely jump-start a vehicle without the risk of battery damage.
  • Question: Can I use this jump starter in cold weather conditions?

    Answer: Absolutely! The BOOKOO Jump Starter is designed to function well in a variety of weather conditions, including cold temperatures. Cold weather can often hinder a battery's ability to start, but with its powerful 2000A capacity, this jump starter can provide enough power to start your vehicle, even in frigid conditions. This makes it an essential tool for those who live in colder climates or plan to undertake winter travel adventures.
  • Question: What are the LED modes used for?

    Answer: The jump starter features three LED modes: high, strobe, and SOS. The high mode provides bright white light for use in dark conditions, perfect for roadside emergencies. The strobe mode can be used to signal for help, while the SOS mode is a vital safety feature that can attract attention in distress situations. This multifunctional use of LED lights makes it more than just a jump-starter; it’s a reliable assistant in emergencies.
  • Question: Is this jump starter portable?

    Answer: Yes, the BOOKOO Jump Starter is designed with portability in mind. Its compact size and lightweight build make it easy to carry in your vehicle, backpack, or toolbox. This means you can have peace of mind knowing that you have a powerful jump starter that won’t take up much space. Whether you’re traveling long distances or just commuting, it's an essential piece of emergency equipment that you can easily bring along.
  • Question: How long does it take to fully charge the jump starter?

    Answer: The BOOKOO Jump Starter can be fully charged in a couple of hours when using the included wall charger. This quick charge time ensures that your jump starter is ready to go when you need it. It's important to keep it charged, especially if you plan to use it during long trips or outdoors, where access to power sources may be limited. Quick charging helps avoid waiting around during critical situations.
  • Question: Can this device charge other electronics apart from jump-starting vehicles?

    Answer: Yes, the BOOKOO Jump Starter is versatile. Besides jump-starting vehicles, it can also charge other electronics via its USB ports. This feature is incredibly useful for travelers or outdoor enthusiasts who need to keep their mobile devices powered. So, whether you're in a remote location or just need to keep your smartphone charged during a long trip, this jump starter has you covered.
  • Question: Where can I buy the BOOKOO Jump Starter 2000A?

    Answer: You can buy the BOOKOO Jump Starter 2000A from Ubuy. Ubuy offers a great online shopping experience, ensuring you can conveniently find this jump starter along with detailed product descriptions and customer reviews. It’s a reliable platform for securing your essential automotive tools, allowing you to shop with confidence.

BooKoo Jump Starters A9 Editorial Review

The portable battery jumper has received overwhelmingly positive reviews from users who commend its effectiveness, compact design, and ease of use. Many customers shared their experiences in which the device successfully jump-started their vehicles on the first attempt, even after prolonged periods of inactivity. Its ability to charge quickly, taking as little as 90 minutes to reach full capacity, is another frequently mentioned advantage. Users appreciate its portability, allowing it to easily fit into bags or be carried around without inconvenience. Despite its numerous benefits, some users noted a minor flaw: the battery tends to lose its charge over time if left unused. This occasional need for recharging may require monitoring to ensure optimal performance, especially on days when it might be urgently needed. A few customers also mentioned the absence of clear instructions regarding parts of the device, such as the ON-OFF slider button, though this did not significantly hinder their overall positive experiences. In summary, this portable jumper is regarded as a crucial accessory for vehicle owners, valued for its reliability and modern convenience in emergency situations. **

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Pros

  • Effective in jump-starting vehicles on the first try.
  • Quick charging time (approximately 90 minutes).
  • Compact and portable design.
  • Simple and straightforward to use.
  • Suitable for various applications, even beyond vehicles (e.g., lawn mowers).

Cons

  • Tends to lose charge over time if not used regularly.

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Mohammad
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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”

23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”

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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”

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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”

22 July 2026 · via Trustpilot
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“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”

23 July 2026 · via Trustpilot
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