J401X 2500A 12V Jump Starter, -40℉ Auto-Heating Tech, Lithium Car Battery Booster Pack with 100W Two-Way Fast Charge, Portable Jump Box Jumper Cables for Upto 8.5L Gas and 6.5L Diesel Engines

It should work well during the winter months, and it is not bulky or too heavy to handle.

Started a 2005 6.0l diesel excursion with a dead battery. To the point where when I released the clamps the excursion died. After putting in a mostly dead battery it was able to start and keep running after releasing clamps. Had to shut it off after charging glow plugs as it will shut off after a few turn overs but once plugs are charger you can turn the charger back on an it will start it. I have to do it 6 times due to changing batteries and it still had one of four charge bars. I was impressed as i have not seen one if these that can get our excursion started after sitting for a few months. I put a dead battery in it on purpose to test. (First battery had been sitting for years) 2nd was actual excursion battery. I wish the clamps were not so cheap feeling but they have not broken or anything. Charges back up in a few hours.

Wanted to charge the unit, but not matter what method I use the unit will not power on. I've only used it one time. It's about a year old. I was charging it every couple of months to keep it charged, but it will not longer work.However, the company contacted me about the problem, and was able to get the issue resolved.

The media could not be loaded. To start off with I’m a farmer which means half the time a mechanic and fighting equipment not starting. A couple years ago with purchased the name brand booster pack GB150. To be honest it’s been a love hate relationship as warranty has replaced it twice due to issues and just doesn’t perform as we expected. We needed to have another portable battery pack so started looking for alternatives. I came across the Lokithor J401X which is advertised smaller than the one we already have. The price was right so wanted to try it and compare. Pleasantly surprised!!! The build quality is equal to the more expensive but the Lokithor has much better display, light, and charging port options. The battery clamps are high quality tight springs. The screen is bright and easy to view. The led light is bright and nice feature. USB C is much nicer than alternatives. Smaller in size than competitor. This obviously doesn’t matter after first opening booster but the packaging is top notch!! I felt like I was opening an Apple device! Nicely done Lokithor! I will keep testing but currently have jumped side by side, truck, diesel service truck and booster still shows 75% battery. As it stands currently I will grab this booster over the $300 competitors any day.

This jump pack is pretty powerful and jumps everything with ease. Works great everytime. I had one that went bad after only a couple months of having. Emailed customer support and they were willing to ship a new one out. Would recommend to everybody because they take care of their people and they have amazing products.

My unit was used once to start a Ford econoline van. Worked as advertised.3 months later I took the unit out of the closet to test and make sure it was fully charged as we were going on a road trip. The unit was dead and would not take a charge. I contacted customer service as the unit is still under warranty. They asked for video proof that unit was bad. Sent them several videos and descriptions, copies of invoices. They have not resolved the issue and have stopped answering emails.Crap product, crap customer service.

When a battery is really dead, it needs a few minutes to charge enough for a battery jump start to work. My battery is good, so to test it, I disconnected the cables from the battery and connected the LOKITHOR leads directly to the battery cables. Using the FORCE start feature, the engine started up as if it was on battery power. It really works good.

Do not buy this product . I’ve used it for a year now and it will not take charge. Great until now it will not hold up for you.