VACASSO A9 Jump Starter 4000A — 12V Car Battery Booster with USB, LED Light, Case

Powerful, portable, and ready for the road

Meet the VACASSO A9 Jump Starter, a compact power tool engineered to start 12V engines with a peak current of 4000A. It supports up to 7.0L for gasoline engines and 4.0L for diesel, making it a versatile companion for cars, motorcycles, boats, trucks, and even tractors when surprises strike. On a full charge, it can deliver multiple jump starts, helping you regain momentum without waiting for a tow. This device blends performance with practical design, so you can keep one emergency solution in your glove box or bag for spontaneous adventures or everyday errands.

4 in 1 versatility for everyday moments

The A9 is more than a jump starter. It doubles as a high-capacity power bank, an LED flashlight, and an SOS emergency beacon. A smart LCD screen keeps you informed about battery status and current mode, while its compact footprint (6.61 x 3.37 x 1.7 inches) makes it easy to store or carry during roadside stops or weekend trips.

• Compact size and lightweight build for effortless transport and storage
• Rugged protective case included to shield the unit during travel

Fast charging and device power on the go

Recharge the A9 quickly with QC3.0 and a 18W USB-C input, so you can top it up fast and power a range of devices. Outputs include USB 5V/9V/12V Quick Charge, which suits smartphones, tablets, cameras, drones, GPS devices, and more. This makes it a practical choice for travelers, campers, and everyday commuters who rely on portable power.

• USB-C input for rapid recharging
• Multiple USB outputs to keep essential devices alive

Three light modes for visibility and safety

The built-in LED light features steady, flashing, and SOS modes. Designed to operate across a wide temperature range from subfreezing to hot conditions, it also offers a long standby time, making it a dependable tool for emergencies or outdoor adventures when lighting is critical.

Smart protection, simple, safe operation

Ten intelligent protections minimize misconnection risks and sparks, providing reassurance during use. A gentle reminder to recharge every 2–3 months helps maintain readiness without feeling burdensome.

What you get and warranty

Your package includes the jump starter, smart clamps, USB-C charging cable, user manual, and a protective case. VACASSO backs the A9 with a two-year full warranty, offering added confidence should you have questions or issues down the line.

Tips for best performance

Fully charge before first use and recharge every 2–3 months. Store in a protective case away from heat or extreme cold. Wait 30 seconds between jumps to prevent overheating and extend the device life.