JNC305

This thing proves its use time and time again. I have a few vehicles and they sit and require jumps quite frequently. This thing always gets them started and it has enough battery to do it over and over again before it needs a charge. I’ve charged it maybe twice or three times and I think I’ve used it at least a dozen times if not a little more. It’s compact and lightweight good quality and I think it’s worth the money…it’s lightning fast as well..

Excellent product. Have had it for over a year and used it three times for myself and friends. Reliable and easy to use and versatile.

I bought two of these — one for each car — and I’m beyond impressed. They replaced my older, bulky jump starters that used standard sealed batteries. The JNC325 is significantly lighter, occupies much less space, and still delivers substantial power. It easily started my SUV and has already helped me give a jump to a stranger in a grocery store parking lot. What I love: • Strong enough to start large engines (up to 8.0L gas / 6.0L diesel) • Compact and lightweight — easy to store under a seat or in a trunk • USB-C charging is fast and modern • Feels solid and dependable, with heavy-duty clamps Bonus: Because it’s so compact, I don’t mind keeping it in the car all year — and it stays charged for months—great peace of mind, especially in cold weather. Whether it’s for your emergencies or to help someone else, this is one of the smartest things you can keep in your vehicle. Highly recommend.

This is an excellent product. Works great. Definitely worth to money.

What if you are stranded with a dead battery, and there is not another car in sight? Or there is another car, but no jumper cables! Wouldn't it be a life saver to have a 12v power pack designed to jump start an automobile. With its own jumper cables! That's exactly what the HPBS Jump Starter is, and more. This 12v jump starter power pack comes with jumper cables, a USB charging cable (but no power adapter), a cigarette lighter adapter (though many autos no longer come with a cigarette lighter) and a user's manual. All in a really nice, and sturdy, storage case that is only 9.5"L X 5.5" W X 4" H. The power pack also comes with two USB outputs for powering other devices. And also includes a built-in LED light with three functions (flashlight, SOS, strobe). The cigarette lighter cable enables "reverse charging" that provides charging of the car battery, in roughly 20 minutes, through the cigarette lighter port. The one disturbing issue for me revolves around temperature. In the Care and Maintanence section of the User's Manual there are two warnings: "DO NOT put the product under direct sunlight or hot areas." and, "DO NOT place the product in high temperature environment for long. The operating temperature: -22F - 140F." These are direct quotes, including the all caps emphasis. Well I live in Texas, and I am concerned about what I consider to be somewhat vague direction. In Texas, in the summer, even a garage is a hot area. And how long is too long. I do not want to risk my car, or my home when the car is in the garage. Do I need to bring the pack inside the house when I'm not driving the car. But what about when I drive somewhere with the pack in the car, but when I arrive at my destination (lets say a dinner party, or a movie, or maybe a football game) do I need to carry the power pack with me to be safe? And in something like a football game or fishing trip where I would be staying outside what is safe way to handle this power pack? Also, the power pack requires recharging every 3 to 6 months.

Works great, started my 5.3L more than a few times without issue and takes up very little space tucked under the back seat.

This thing is awesome. I used it to jump my 5.7L '99 Yukon without so much as a struggle. I used the jump pack 4 or 5 times between different vehicles before I decided to chathe it back up. It was still showing 75% charge. HIGHLY RECOMMEND!

This Jump N Carry box is designed to shut off it's power after 25 seconds of on time! Absolutely STUPID function of shutting off after 25 sec. - just about the amount of time to go from under the hood and into the driver's seat, get the key in and try to start it. We bought 2 of these - will return these and go back to NOCO GB70's which don't shut off until you power them off - MUCH for suitable for busy shops like ours! We don't have time to go back and forth trying to beat the 25 second timer. I called Jump n Carry and they said they included this 25 seconds until shut off as some kind of "Safety feature" and they have no desire to change anything. It does work to jump start a vehicle - as long as you can get it started within 25 seconds of the time you turn it on under the hood. This would be fine for a homeowner why only discharged his battery, but not for any car that may have a problem making it difficult to start. We have used the NOCO boxes for years, and these are lighter weight with longer cables - but the HUGE drawback is the 25 second timer. We only crank the starter a maximum of 3 seconds per cycle and then let the NOCO box rest for 30 seconds, but with this stupid 25 second shut off, we have to keep going back and forth under the hood to start anything. Too bad Jump n Carry designated such a stupid 25 second shut off feature into the otherwise high quality jump box!