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LOKITHOR J400 2000A 12V Portable Lithium Jump Starter, Car Battery Booster Pack, USB-C Powerbank Charger, and Jumper Cables for Upto 8.0-Liter Gas and 6.0-Liter Diesel Engines

TLDR Review: LOKITHOR J400 Jump Starter

Item: LOKITHOR J400 Jump Starter
Author: ShopSavvy

By ShopSavvy Team

Published: February 14th, 2026

Pros

•Provides great peace of mind by allowing you to jumtart your vehicle on your own without needing another car.
•Capable of jumtarting a variety of vehicles, including cars, motorcycles, lawn mowers, and even larger engines up to 8.0L gas and 6.0L diesel.
•Compact, lightweight, and portable design fits easily in your vehicle and can even be stowed under a seat.
•Charges quickly via US and retains its charge well over several months, making it reliable even after storage.
•Includes a multifunctional, extremely bright flashlight with hazard flashing modes for emergencies and nighttime use.
•Large, bright, and easo-read display plus clear one-button operation makes it very user-friendly.
•USB ports (both US and USB-A) allow emergency charging of phones or other devices, adding extra utility beyond jump-starting.
•Strong battery capacity indicated by the somewhat heavier feel despite compact size.
•Large battery clamps aid easy attachment to terminals, especially on larger vehicles like trucks.
•Successfully jumtarts older and tough batteries, including during harsh conditions such as hard freezes.

Cons

•Does not come with a storage case, which could improve convenience and protection.
•Flashlight, while powerful, can drain the unit's battery if used for extended periods.
•Phone charging speed via USB is slower than a standard home AC charger, so don’t expect a fast top in an emergency.
•Some users notice the device is a bit heavier than expected for its size, though this reflects battery strength.
•Recommended to recharge every three months to maintain battery health, which requires some upkeep attention.

Bottom Line

The LOKITHOR J400 2000A Portable Lithium Jump Starter is a powerful, compact, and versatile device that delivers excellent jump-start performance for a wide range of vehicles, plus emergency phone charging and a bright flashlight for added convenience. Its intuitive design and reliable battery retention make it a solid choice if you want a trustworthy emergency power bank on wheels. Just keep in mind it comes without a storage case and requires periodic recharging to keep it ready. If you want a well-rounded jump starter with modern USB-C charging and serious power for big engines, this one fits the bill perfectly.