Jump Starter Lokithor J403HD, 229.4Wh Portable Car Battery Booster, 10,000A Peak Current

The Lokithor J403HD is a 12V portable jump starter that combines a high-capacity power bank and a vehicle battery booster. It features a Li‑Po battery with 236.8 Wh (listed also as 229.4 Wh in some materials) capacity and is designed to provide strong starting power for gasoline and diesel engines. With fast charging capability and multiple output ports including USB‑C and USB‑A, the unit also serves as a multifunctional power source for mobile devices. The casing is rated IP65 for protection against dust and splashes, and an integrated 400‑lumen LED flashlight aids use in low‑light situations.

Advantages

The J403HD delivers a very high peak current (up to 10,000 A) for quick engine starts and uses a Li‑Po cell chemistry intended for long cycle life. Fast charging via USB‑C (up to 100 W) and a DC output for 12.8–16.8V/10A make it versatile for charging phones, laptops and powering 12V devices. Built‑in safety protections guard against overheating, short circuits and reverse polarity, while the IP65 enclosure and wide operating temperature range support use in demanding conditions.

Suitable for

• Starting passenger cars, SUVs and light trucks with gasoline or diesel engines
• Roadside emergency use and vehicle recovery
• Workshops, fleet maintenance and professional roadside assistance
• Charging smartphones, laptops and other mobile electronics while traveling

When it may not be suitable

The device is intended for 12V vehicle systems and is not suitable for 24V systems without appropriate equipment. Although the peak current is very high, starting very large industrial engines or specialized heavy machinery beyond typical light truck capacity may exceed the intended use. Charging the unit is limited to the specified input temperature range.

Key specifications

• Battery type: Li‑Po
• Capacity: 236.8 Wh (listed variants may show 229.4 Wh / 64,000 mAh)
• Voltage compatibility: 12V systems
• Peak current: up to 10,000 A
• USB‑C output/input: supports up to 100 W (PD profiles including 5–20V; input 5–20V/5A)
• USB‑A output: up to 18W (QC)
• DC output: 12.8–16.8V / 10A
• LED flashlight: 400 lumens
• Charging time: approximately 2–3 hours
• Operating temperature: -20°C to 60°C; charging temperature: 0°C to 45°C
• Ingress protection: IP65
• Safety features: multi‑level protection including overheat, short circuit and reverse polarity protection

How to use

Before use, ensure the jump starter is sufficiently charged. Connect the clamps to the vehicle battery following polarity—red to positive, black to negative—and confirm the unit’s indicator shows correct connection and readiness. Use the appropriate output port to charge mobile devices or power 12V equipment. After starting the vehicle, disconnect clamps in the reverse order. Follow the manufacturer’s instructions for charging, storage and maintenance to preserve battery life.

What to consider before purchase

• Compatibility with your vehicle's 12V electrical system (not suitable for 24V systems)
• Required starting capability for your engine size—intended for passenger cars, SUVs and light trucks
• Operating and charging temperature limits (charging only between 0°C and 45°C)
• Portability and included accessories for your use cases (clamps, cables, car adapter)

Usage recommendations

Keep the jump starter charged when not in frequent use, store it within the recommended temperature range, and follow polarity guidance when connecting clamps. Use the USB‑C port for fast charging of compatible laptops and the DC output for 12V accessories. For heavy‑duty or 24V vehicles, consult a suitable specialist device.