Loki Thor JP400 Review: A Jump Starter, Inflator and Light in One Package

Introduction

Every vehicle owner eventually runs into the same two problems: a battery that will not turn over, and a tire that is running low at the worst possible moment. The Loki Thor JP400 rolls an answer to both into a single portable unit. It is a battery jump pack for vehicle starting that also carries a built-in tire inflator, a flashlight, and USB output for charging devices. Retailed at roughly a hundred dollars, with frequent discounts available, it positions itself as the kind of gear you keep in the trunk and forget about until the day it saves your plans.

What sets this unit apart from the usual jump box is how complete the package feels, especially with the optional accessory case, which adds about $23 to the total but earns its keep in day-to-day use.

Who This Product Is For

The JP400 fits anyone who drives in places where help is far away: homesteaders towing trailers, off-road riders, or anyone running older vehicles that sit long enough for batteries to drain. It has already proven itself on an ATV that had been sitting too long; connected to the battery, it fired the engine away without drama.

With a starting current of 1,500 amps and a peak of 2,500 amps, it has headroom for a wide range of vehicles, from small engines up through standard car batteries. And because it doubles as an inflator and light, it is just as useful for routine maintenance as it is for emergencies.

Main Strengths

Jump Starting Power

The headline numbers are a 1,500A starting current and a 2,500A peak, which translate into confident, quick starts. Jumping a long-idle ATV is a realistic worst-case scenario, and this pack handled it easily.

Built-In Inflator

The inflator is more than a token feature. You set a target pressure in PSI, it goes up in increments of five if you hold the button and by single steps if you tap, and the unit stops automatically once it hits your target. It tops out at 150 PSI, which is far beyond what most tires need. In real use, it moved a trailer tire from 4.7 PSI up to a 40 PSI target quickly, and the air movement is genuinely strong.

One caution learned the hard way: the air hose screws onto the valve through a brass fitting, and it needs to be tightened firmly. A loosely seated fitting vibrates loose over a long fill, slows the pump, and even makes the fitting run hot, reaching close to 178 degrees Fahrenheit in one session. Screw it in tight and none of this is an issue.

Flashlight and Charging

The unit doubles as a standalone area light with 300 lumens of output, plus a strobe mode and a forward flashlight. It also offers USB-A and USB-C output ports, with USB-C used for recharging the pack itself. That makes it a genuinely useful backup battery on camping trips or during a power cut.

The Accessory Case

The optional hard case is the sleeper feature here. It holds the air hose, the battery cables, a small bag of accessories, a USB-C charging cable, and the instructions, and it zips up one-handed. That matters more than it sounds: after jumping a vehicle, you want to pack up fast and get moving. It stores everything whether the cables are connected or not, and nothing needs to be wedged in or folded just right. The included battery cables themselves are well made, though some users may find them a touch short.

Things to Consider Before Buying

The case is an add-on, not included, so budget for it if organized storage appeals to you. The battery cables are on the shorter side for some tastes. And during extended inflation, the unit gets noticeably warm near the hose connection, so it is worth paying attention during long fills. None of these are dealbreakers, but they are honest trade-offs to weigh.

Buying Advice

At around a hundred dollars before discounts, plus $23 for the case, the total investment is modest for something that covers jump starting, inflation, lighting, and device charging in one unit. For anyone who tows, drives off-road, or simply wants fewer single-purpose gadgets cluttering the garage, that combination is hard to beat. Keeping it charged after each job means it is always ready for the next one.

Conclusion

The Loki Thor JP400 earns a permanent spot in the vehicle by doing four jobs well instead of one job perfectly. Strong starting current, a capable automatic inflator, a bright area light, and USB charging make it the kind of tool you reach for constantly, not just in emergencies. Add the case, tighten the hose fitting, and it is easy to recommend.