Jump Starter Lokithor J402 PRO 88.8 Wh 3500 A - portable car jump starter, battery pack

The Lokithor J402 PRO is a compact 12V jump starter with an 88.8 Wh battery and up to 3500 A peak current. It is designed to start gasoline engines up to 9.5 L and diesel engines up to 7.5 L, and also works as a power bank with bidirectional 100W fast charging. The unit includes an integrated 300-lumen LED flashlight, a durable IP65-rated housing, and a set of accessories (USB cables, 12V adapter, engine jump leads, and a pouch) to be ready for use out of the box.

Advantages

The J402 PRO combines high starting current with fast recharge: a peak current of 3500 A and a starting current of 2250 A allow multiple reliable engine starts, while the 100W USB-C input/output shortens device charging time and supports charging of laptops and mobile devices. Built-in battery management and multiple protections guard against reverse connection, short circuit, overcurrent, overcharge, overheating and abnormal voltage. Compact dimensions and IP65 protection make the device convenient to store and resilient in everyday and emergency situations.

Suitable for

• Passenger cars with 12V electrical systems
• Motorcycles, small boats and recreational vehicles
• Gasoline engines up to 9.5 L and diesel engines up to 7.5 L
• Users needing a portable power bank for phones, tablets or laptops

When it may not be suitable

The J402 PRO is intended for 12V systems and is not suitable for 24V commercial vehicles or heavy machinery that require higher-voltage starters. For very large diesel engines beyond the specified 7.5 L limit, performance cannot be guaranteed and a heavier duty starter should be considered.

Key specifications

• Battery capacity: 88.8 Wh (6000 mAh)
• Starting current: 2250 A; Peak current: 3500 A
• Supported engine sizes: up to 9.5 L gasoline / up to 7.5 L diesel
• Input (charging): USB-C up to 100W; DC 12V=5A (60W max)
• Output: USB-C up to 100W; USB-A up to 18W
• Dimensions: 240.32 × 106.5 × 60 mm
• Charging time: approximately 0.9–1.4 hours
• LED flashlight: 300 lumens, 3 modes
• Operating temperature: -20 °C to 50 °C; Charging temperature: 0 °C to 45 °C
• Lifecycle: >1000 cycles (under optimal conditions)
• Ingress protection: IP65

How to use

Fully charge the jump starter via the USB-C port or the 12V input before first use. To start a vehicle, attach the red clamp to the positive terminal and the black clamp to the negative terminal of the 12V battery, ensuring correct polarity. Power on the unit if required and attempt engine start following the vehicle manufacturer’s instructions; disconnect clamps after the engine runs. Use the USB-A or USB-C ports to charge mobile devices or laptops as needed, and switch the built-in flashlight on for low-light situations.

What to consider before purchase

• Confirm your vehicle uses a 12V electrical system and that engine displacement falls within the supported limits
• Consider required charging speed for your devices—USB-C 100W supports fast charging for laptops and phones
• Check ambient temperature ranges for storage and operation if you will use the device in extreme climates

Usage recommendations

Store the jump starter charged and check its state periodically; follow the clamp polarity markings and the user manual to avoid damage. For extended storage, recharge every few months to maintain battery health.