Portable Car Jump Starter, 4000A Peak Battery Charger, 12V Jump Box for Truck up to 10L Diesel, Motorcycle, Dual USB Power Bank, LED Light, Great Battery Jumper for Road Side Emergency Kit for Car

I have a buddy had this killer device charger he took with him on trips simply to have a large capacity for keeping his phone, laptop and things full. He spent well over $100 for it. I thought it was great. Here's the thing, it can’t jump start his car too! Here is my point, for well over 25% less cost, this device does the same thing, even has a larger capacity then his... AND... in a pinch happens to be able to both jump start my truck, but also act as a long lasting emergency flashlight. Why would anyone buy one of those storage bank device chargers when these things exist? 21000mah.. this will charge any device well over 5 times from zero to full. this is a must have! It works great, has two USb inputs for charging multiple devices at the same time, built well, takes only a few hours to charge... and keeps its charge for a VERY LONG time. don't hesitate. nab it. Great gift too!

First, the price is excellent. Second, it shipped right away. Third, it was packaged well. Fourth, the actual product packaging (carrying case, cables, etc.) is very good. Fifth—and very importantly—it came fully charged! That was a vital feature, because I immediately needed it to started my grandson’s car. He had left the car with me during his summer college break, and the battery died unexpectedly. The car (a 2018 Honda Civic) was parked in a place where no other vehicle could come near it for a jump start. Right out of the box, this handy little unit started my grandson’s car 3 times in 2 days. So I was able to start the car, back it out of its tight spot and drive straight to AutoZone for a new battery. Easy-peezy! I’m delighted with everything about this handy charger—including the orange color (which I love)! You can spend more … but why would you? Highly recommended.

I started using jumper boxes back in the late 90's when I transported autos. Then they were on wheels and took up a lot of space. I bought this because the price was right, and a friend had one like it. I did not think it would work because of my previous experience with the old style boxes. "NOTHING that small can jump off an F350!" Well, it did! I bought this, along with some cables to keep in my new pickup. So far, I have jumped off 2 motorcycles, 3 cars, 2 pickups, and a boat. (One motorcycle was mine, everything else were people in need.) It is WELL worth the money and is irreplaceable when you need it. It holds a decent charge for a few months, but I charge mine monthly. The trick is to let it sit on the dead battery for a few minutes, about 3 to 5, before trying to crank the dead engine. This is not an 'everyday use' item. BUT, as my old 1st Sergeant used to say, "It is better to have and not need, than to need an not have..." I hated him for making me ruck extra stuff, but, now that I am older, those are some VERY wise words! I would buy this again! It's worth the money!

I purchased this in November 2022 after my (then) 2.5 year old Subaru battery died due to the key fob being left in the vehicle for a little over 24hrs with temps in the teens and the battery (apparently) being weak already. The jumpstarter worked the first time without a flaw. I used it about a year later for my fiancé’s old car when it’s battery also went bad, and again, it worked like a champ. I use it to charge my phone until it drains completely then recharge it every once in a while before storing it again. I needed it again today, but despite the indicator lights showing a full charge, it gave enough juice to halfway turn over the vehicle but immediately died. I am going to recharge it completely overnight and try again. Either way, this thing has helped me out of several situations and definitely worth the ~$40 (don’t think it was even that much back then). I’ll update again once I see if it holds a charge.

I have been using this to jump start a 2004 Jeep Cherokee with the 4.7 V8. I say be patient because of this, if I hook it to the battery and immediately try to start it, the starter will click and not turn the engine over. However, even with the 800cca battery and the V8, if I hook up the charge box, then wait 4-5 minutes, then turn the key, she cranks really fast and fires up every time. This unit is small and easy to carry, and if you give it a few minutes to transfer power to the battery, you are good to go in almost any situation.

I read through the one star reviews and found them very entertaining. Most of the problems people had were because of their lack of knowledge. I've had mine for quite a while now. Once you understand how the electronics work, this thing is amazing. When you press the button and it shows 4 bars. That's not for the jumpstart part of the box. Plug in to charge it and when it's done blinking, it's done charging. After hooking this up to the car, press the button on the cable module to reset it. Give it a couple minutes before trying it. I've jumped a completely dead dual battery monster diesel, 2 golf carts, my motorcycle, and a work truck off of a single charge. It does take a very long time for a full charge. 2 days the last time with a super fast charger for my cell. This actually my second one. First one I got for Christmas and got busted up from a fan blade. Be careful where ya put it when ya start the car. Lol. I threw out a junk Dewalt jump box that lasted less than a year. This unit is still running strong. After all this time it doesn't jump as well. I can usually get 2 completely dead car batteries to start before charging it. Anyone that posts a one star review on this product should take it to their local mechanic and request lessons on using it correctly. For a tow truck to come jump start a car around here is $100+. This is a no brainer.

I've had this for over a year now and have used it dozens of times. However it has only worked once or twice. If your car wont crank it's useless, if your car is cranking but not fast enough to start it might just get you going but never rely on one of these, always carry jump leads as well. The problem with these is they only put out 12 volts when freshly charged, so if your battery is say 11 volts, they wont increase the voltage or charge your battery, they might just give you a few more amps to get you going if you left your lights on for 15 minutes while at the grocery store but will do nothing if your battery is dead in a no crank situation. How they claim to start a semi truck beats me as mine wont even start my Honda! If you like to get out there camping etc, where a jump is not an option invest in a professional lead acid battery starter or just carry a spare car battery. These Lithium packs are just an expensive gimmick.

This is a fantastic product. We have a car that would frequently die in the garage, we have kids... This is easy to use and starts the car effortlessly. I was skeptical about this when we recieved it, but it works well. It has started the car multiple times off of a single charge. For reference the car is a 2019 Subaru Ascent it has the turbocharged 2.4l engine. This has also started a Silverado with a 4.8l engine and a Volkswagon SUV of some kind with a diesel motor. You probably will not start a tractor with it, but it is fantastic for cars, small trucks and SUV's.