VACASSO Jump Starter A9 12V 4000A Portable Car Jump Pack Red — 7.0L/4.0L Start, QC3.0 Power Bank, LED Light

Designed for drivers who want a reliable, easy-to-use emergency power source, the VACASSO A9 blends high peak current with multiple utility features in a pocketable package. It fits SUVs, trucks, and motorcycles up to the stated engine sizes and includes fast charging ports, a bright multi-mode light, and built-in safety protections so you can handle roadside battery issues without a second vehicle.

How quickly will the A9 get my car running again?

The A9 delivers up to 4000A peak current to provide instant starting power for gasoline engines up to 7.0L and diesel engines up to 4.0L. In most cases it will crank a dead battery in seconds, with up to 20+ starts per full charge depending on engine size and ambient temperature.

• 4000A peak output for fast cranking.
• Rated for 7.0L gas / 4.0L diesel engines.
• 20+ starts per charge under typical conditions.
• Operates in extreme temperatures from -4°F to 140°F.

What safety features protect me and my vehicle?

The A9 uses intelligent clamps and internal circuitry that only supply power when clamps are connected correctly, reducing human error. Ten layers of protection guard against reverse polarity, short circuits, overcurrent, and overheating so both beginners and experienced users can work confidently.

• Smart-clamp activation prevents misconnection mishaps.
• Reverse-polarity, short-circuit, and overcurrent defense.
• Thermal monitoring to avoid overheating during repeated starts.
• Clear LCD indicators show status and charge level.

Can I use the A9 to charge phones, cameras, or other devices?

Yes — the A9 doubles as a power bank with dual USB outputs and QC3.0 fast-charge capability. An 18W USB-C input quickly recharges the unit so it’s ready for the next trip; meanwhile the USB outputs deliver stable power for phones, tablets, cameras, and small electronics on the road.

• QC3.0 fast charging for compatible devices.
• 18W USB-C input for rapid recharges of the jump pack.
• Dual USB outputs to power two devices at once.
• Useful for camping, road trips, and emergency device charging.

What other emergency functions does it include?

Beyond jump-starting and device charging, the A9 features a 400-lumen LED light with steady, strobe, and SOS modes to assist with nighttime repairs or roadside visibility. Its compact footprint and light weight make it easy to keep in a glove box, center console, or backpack for unexpected situations.

• 400LM three-mode LED for work light, warning, or SOS signaling.
• Ultra-compact size: 6.61 x 3.37 x 1.7 inches and 1.5 lbs.
• Portable enough to store in glove box or carry on hikes.
• Quick tips included for storage and maintenance.

Who is this for? The VACASSO A9 is ideal for drivers who want a dependable, multi-purpose emergency power solution without bulk — commuters, weekend adventurers, RV and truck owners, and anyone who prefers to be prepared. It’s especially useful if you need a combination jump starter and power bank that’s easy to use, safe, and compact enough to store in your vehicle or gear bag. Always follow the included safety guidance and keep the unit charged for best performance.