Portable Jump Starter Hummer H4K – 20000 mAh Powerbank + PD30W Fast Charge (4000A, 12V)

Portable jump starter Hummer H4K with 20000 mAh powerbank + PD30W (up to 4000A, 12V) designed to start 12V vehicles within seconds while functioning as a fast USB-C charger.​ Hummer H4K represents a revolution in the field of portable jump starters. It is a multifunctional device that combines a powerful car starter and a smart USB-C powerbank with support for PD30W fast charging. Thanks to the innovative “4th generation” system, the H4K offers significantly higher performance, longer life and reliable operation even in extreme conditions. This battery-free jump starter can start a discharged car, motorcycle, boat, jet ski, ATV or lawn mower in a matter of seconds without the need for external electricity or a towing vehicle.

With a maximum peak current of up to 4000 A and a terminal capacity of 2000 A, the Hummer H4K can handle all types of 12V batteries in both gasoline and diesel engines. It can handle multiple starts on a single charge, which you will appreciate especially on longer trips, in winter or in situations where you need quick help without waiting. The starter is designed to work reliably with the latest vehicle technologies, including EV, Turbo, Hybrid and Start-Stop systems. This makes it an ideal choice for modern cars that require stable and high-voltage starting voltage.

Hummer H4K – Powerful battery-free jump starter for 12V vehicles

In addition to the jump start function, the Hummer H4K is also a powerful power bank with USB-C Power Delivery (PD30W) support. It allows you to quickly charge your mobile phones, tablets, laptops or other electronics, even your USB-C MacBook while traveling. Thanks to intelligent power management, it automatically recognizes the connected device and adjusts the output power for the fastest and safest charging. You can charge a compatible iPhone from 0% to 50% in just 30 minutes. The bidirectional USB-C port allows not only fast charging of devices, but also fast charging of the power bank itself in about 3 hours when using a USB-C PD charger.

Long-lasting, reliable and durable in any environment

The Hummer H4K has been designed with reliability and durability in mind. It uses modern lithium-ion cells with a capacity of 74 Wh (20000 mAh), which offer more than 1000 charging cycles without loss of performance. The device will hold a charge for up to 9 to 12 months in standby mode, which means you can leave it in your car ready for immediate use whenever you need it - even after a long period of time. The operating temperature from -20 °C to +60 °C ensures that the starter works reliably in both winter and hot summer. Whether you are in a freezing mountain area or on a summer holiday by the sea, the Hummer H4K will never let you down.

Compact design and easy to use

Despite its power, the Hummer H4K maintains compact dimensions (201 x 132 x 86 mm) and weighs only 1,15 kg, making it easy to fit in your luggage, trunk or even the glove compartment of your car. The starter is designed for easy operation, so even an ordinary driver without technical knowledge can safely use it. Just connect the terminals to the battery and press the button. The engine starts in seconds. The robust design and high-quality terminals ensure safe current transfer and resistance to damage. Thanks to built-in protection against short circuit, overheating, overvoltage and reverse polarity, the Hummer H4K is extremely safe for the user and the vehicle itself.

Whether you drive a car, motorcycle, caravan, boat or operate heavy machinery, the Hummer H4K is a universal solution that will give you confidence in any situation. It is the best portable jump starter for 12V vehicles, which also serves as a powerful power bank with fast charging, replacing multiple devices in one compact body. Thanks to its durability, performance and multifunctionality, it is one of the best jump starters on the market - ideal for home, professional use and travel.

Technical specifications

• Battery capacity74000 mWh / 74 Wh / 20000 mAh
• Battery typeLithium-ion
• Battery lifemore than 1000 cycles
• Charge retention time9 – 12 months
• Maximum current (peak)12 V - 4000 A*
• Terminal capacity12 V - 2000 A
• USB-C input/outputPD30W Max. (5V-3A, 9V-3A, 12V-2,5A, 20V-1,5A)
• Operating temperature-20°C to 60°C (-4°F to 140°F)
• Dimensions201 x 132 x 86 mm (7,9 x 5,3 x 3,4 inches)
• Weight1,15 kg (2,54 lbs)
• * Theoretical short-circuit current
• ** Performance may vary depending on the starter's charge level, ambient temperature and condition of the battery contacts.

Package contents

• 1x Hummer H4K with jump leads
• 1x USB cable
• 1x Manual