GOOLOO GP4000 12V Jump Starter 4000A — Portable Car & Truck Starter with Power Bank and USB‑C Fast Charge

The GOOLOO GP4000 is a compact 4000A 12V portable jump starter designed to rapidly restart cars, trucks, motorcycles and other 12V vehicles while doubling as a multi-port power bank.

Designed for drivers, mechanics and outdoor enthusiasts, the GP4000 combines high cold-cranking power with a large internal battery and multiple charging ports. It delivers quick jump starts for gasoline and diesel engines up to 10.0L, includes heavy-duty metal clamps and a built-in flashlight, and features safety protections and rugged housing for reliable roadside use.

How quickly can the GP4000 revive a dead battery?

The GP4000 delivers a forceful boost that can restart most depleted 12V batteries within seconds when used correctly. Its BOOST function is engineered to push current into very low-voltage batteries so vehicles start without long crank cycles.

• 4000A peak current suited for gasoline and diesel engines up to 10.0L
• BOOST button to override extremely low-voltage conditions
• Rated to start many vehicles over 60 times per full charge
• Works across cars, trucks, ATVs, RVs, motorcycles, boats and more

What safety features protect me and my vehicle?

Safety is built into the GP4000 through multiple electronic protections and reinforced hardware. The unit’s smart circuitry prevents common mistakes such as reverse polarity, over-current, over-voltage and short circuits, so you can use it confidently in emergency situations.

• Ten-layer protection suite to prevent sparks, reverse connection, and overloads
• Durable all-metal clamps minimize wear and ensure a stable connection
• Clear LED indicators and status signals guide correct use
• Rugged plastic housing with rubberized corners for drop resistance

Can I use the GP4000 to charge phones and other devices?

Yes — the GP4000 doubles as a portable power source with multiple outputs for charging consumer electronics. It offers two USB ports (including a fast-charge port) and a USB‑C input/output, letting you recharge phones, tablets, cameras and the jump starter itself.

• Dual USB outputs for simultaneous device charging
• USB-C port supports 5V/3A for faster recharging
• Compact form factor that fits glove boxes and tool bags
• Includes USB‑to‑Type‑C cable and cigarette lighter adapter in the box

How does the GP4000 perform in extreme conditions?

The GP4000’s internal smart chip and construction are selected to maintain performance across a wide temperature range, so it remains usable during cold winters and hot summers. It also includes a bright built-in flashlight to assist with night-time roadside situations.

• Operates reliably from -4°F (-20°C) to 140°F (60°C)
• Built-in flashlight for nighttime or low-light emergencies
• Hardwearing shell and rubber corner protection for field use
• Store in the included EVA case to protect accessories and cables

Who this is for: The GOOLOO GP4000 is aimed at anyone who wants a dependable, portable jump starter that also serves as a multi-purpose power bank. It’s a strong fit for commuters, DIY mechanics, fleet operators, boat owners and outdoor adventurers who need a robust, safe and easy-to-use solution for jump-starting 12V vehicles and charging devices away from power outlets.