S ZEVZO ET03 Car Jump Starter 4000A 74Wh Portable 12V Power Bank, LCD Display & 500‑Lumen LED Light

Compact yet powerful, the ET03 pairs a high-peak current jump system with a multi-port power bank and safety-first electronics. Built-in smart clamps, an LCD battery readout, and a 500-lumen LED lamp make it a useful roadside companion. The unit balances high starting power with portable convenience for drivers, mechanics, and outdoor enthusiasts.

How quickly and reliably will this start my vehicle?

The ET03 delivers up to 4000 amps peak current, engineered to start many 12V vehicles including gas engines up to 8.0L and diesel engines to 7.0L. It includes a force-start function on the clamps for completely dead batteries (0V) when the jump pack is properly charged.

• Peak 4000A to handle large-displacement engines
• Starts up to 50 times per full charge under normal conditions
• Force-start clamp mode for 0V batteries (ensure unit is charged)
• Compatible with cars, trucks, boats, motorcycles, lawn mowers

What portable power and charging options does it offer?

Alongside jump-starting, the ET03 doubles as a 74Wh rechargeable power bank. Two USB-A outputs provide simultaneous device charging at 5V/2A, so you can top up phones, tablets, or small electronics while on the go.

• 74Wh battery capacity for multiple device charges
• Two 5V/2A USB outputs for dual-device charging
• USB-C input for faster recharging of the jump pack itself
• LCD screen shows remaining charge and status

What safety and emergency features are included?

The ET03 incorporates ten intelligent safety protections to prevent overcharge, reverse polarity, short circuits, and sparks. A visual and audible alert system on the smart clamps notifies you of connection errors, and the integrated LED lamp helps in low-light or emergency scenarios.

• 10 protections: overcharge, reverse polarity, short circuit, surge protection, and more
• Smart jumper clamps with lights and beeps for error detection
• 500-lumen LED light with steady, strobe, and SOS modes for roadside safety
• Wide operating temperature range (14°F to 140°F) for varied conditions

What comes in the box and what support is provided?

The package includes the S ZEVZO ET03 unit, smart jump cables, a USB-C charging cable, a protective storage case, and a user manual for quick setup. S ZEVZO backs the product with a two-year service policy to help with any performance or warranty questions.

• Included: ET03 jump starter, smart clamps, USB-C cable, storage case, manual
• 2-year manufacturer service and customer support
• LCD for quick status checks and charge monitoring
• Compact design for easy storage in vehicles or garages

Who is this for? The S ZEVZO ET03 suits drivers who want a dependable, portable jump starter that also doubles as a power bank. It's a practical choice for everyday commuters, road-trippers, boat owners, and small-fleet operators who need strong starting power, clear status feedback, integrated lighting, and multiple device-charging options without adding significant bulk to their kit.