BooKoo 4000A 12V Jump Starter 16000mAh — Portable Car Battery Booster with Fast USB Charging & LED Light

The BOOKOO 4000A 12V jump starter is a compact 16000mAh power pack that safely jump-starts most 12V vehicles and doubles as a fast portable charger and emergency flashlight.

Whether you're stranded with a dead battery at the roadside or heading out on a weekend boating or lawn-mowing job, this lightweight booster delivers high cranking power in a weather-resistant, grab-and-go package. It’s designed to handle up to 8.0L gasoline and 7.0L diesel engines, offer multiple safety protections, and recharge phones, tablets, and other devices quickly.

How powerful is the BOOKOO jump starter and what vehicles will it start?

This unit provides a peak 4000A output and a 16000mAh battery capacity, giving it enough reserve to crank large 12V engines and perform multiple starts on a single charge. It’s suited for cars, SUVs, trucks, ATVs, boats, riding mowers, snowmobiles and many diesel or gas engines within the stated sizes.

• Peak output: 4000 amps for robust starting power.
• Capacity: 16000mAh supporting roughly 15–20 starts depending on conditions.
• Engine compatibility: up to 8.0L gas / 7.0L diesel engines.
• Works in a wide temperature range for outdoor use.

What safety features protect my vehicle and me?

BOOKOO includes multiple intelligent protections that reduce the risk of sparks, reverse connection, over-current and other common hazards. The smart clamps combined with an easy-to-read display make connecting and monitoring straightforward for non-professional users.

• Reverse polarity and spark-proof design to prevent accidental damage.
• Short-circuit, over-current, and over-voltage protections for controlled power delivery.
• Overcharge and over-temperature safeguards to preserve battery health.
• Visible smart screen for real-time status and diagnostics.

Can I use it as a power bank and emergency light?

Yes — the BOOKOO jump starter doubles as a high-capacity power bank with dual USB outputs (including a fast-charge port) and a USB-C input for recharging the unit itself. A built-in 3-mode LED flashlight (steady, strobe, SOS) adds extra utility for roadside repairs or outdoor emergencies.

• Dual USB outputs plus USB-C for device charging and fast recharging.
• Charges phones, tablets, cameras, GPS devices and more.
• LED flash modes for illumination, signaling, and emergencies.
• Portability: lightweight design for glovebox or gear bag storage.

How rugged and weatherproof is this starter for outdoor use?

The housing is designed to resist water, dust, and shocks so it remains reliable in wet, dusty, or rough conditions. The product ships with a protective case made from durable EVA material and a high-quality zipper to shield the unit and make transport easier.

• Waterproof and dust-resistant shell suited to bad weather.
• Shockproof outer casing and protective EVA storage case.
• Compact, grab-and-go form for emergency, marine, and off-road use.
• Lifetime technical support from BOOKOO for troubleshooting.

Who is this for? The BOOKOO 4000A 12V jump starter is aimed at drivers, boaters, RV owners, landscapers, and outdoor enthusiasts who want a compact, multi-purpose emergency power solution. It’s also a good fit for anyone who prefers a portable charger that offers both high starting power and fast USB recharging — useful for commuters, contractors, and weekend adventurers who need dependable starting capability and device charging in one unit.