Rexing - 4000A Jump Starter, 12V Car Battery Booster with 65W Quick Charger
Model: BBY-RJ4000
SKU: 11024674
Customers have good things to say about the product's impressive charging speed, overall performance, and highly portable design. Users also frequently praise the clear LCD display, reliable jump-starting capabilities, and the convenience of the included flashlight and carrying case. While the device is generally well-regarded, some users noted that it is slightly larger in size.
Equipped with a powerful 24000mAh battery, the RJ4000 jump starter quickly revives 12V vehicles including cars, trucks, boats, and more, supporting gasoline and diesel engines up to 10 liters.
The clear LCD screen shows real-time status indicators, making it easy to monitor battery level and operational status at a glance.
Features a 65W USB-C in/out port and a QC3.0 USB-A port. Fully recharges in just 1.3 hours and powers devices such as phones, laptops, and tablets—perfect for travel and camping.
Start vehicles in low-voltage conditions with one touch. Built-in LED flashlight includes SOS, strobe, and steady light modes for emergencies.
Operates from -4°F to 140°F, IP64 water-resistant and dustproof. Certified to FCC, CE, ROHS, and UN38.3 safety standards. Includes 12-month warranty and responsive customer support.
Learn more >