Wagan EL7507 Jump Starter iOnBoost V10 Torque 1000Amp Peak 12V Portable Lithium Car Battery Up to 7.8L V10 or 6.7L Diesel, 12V Jump Pack with Built-in LED Bright Light, UL Certified

I had full charge, I jump two big rig 18 wheelers rigs. My friend is truck driver, left his lights on, he came out, he had dead battery. I jump his rig using this product, the truck started up in one crank, I did the same another truck had the same problem, use this it started the same way in one crank. I will buy this again, This work as battery back up.This best jump start, battery back I ever bought. This can start 2 freightliner 18 wheeler big rig trucks, both trucks forgot turn lights and turn trucks off , took keys in 10 minutes, both trucks are dead battery.I like add more, today, I use power bank the WaganTech v10 on boost torque jumpstart big rig EV custom RV 8 lt dis. Work med great in 1 crank! We tried that again quick start just this small unit start big rig Simi truck

I don't usually even write reviews, but this was such a great product, I wanted to. I am disabled with hand and wrist mobility challenges. I don't drive enough, and after the first cold snap, my car battery was dead. I didn't know these sorts of jump start batteries existed, but thought I would give it a go. My car is a sport sedan, V6 3.7 liter, no idea about the battery. Anyway, I picked this because of price, the small size, the compact case, and the manufacturer's visible presence online. I received it and its accessories within a few days, it arrived partially charged, but I used the enclosed USB-C cable and changed it for about 4 hours via my phone AC adapter until it was fully charged. The next day, I was easily able to connect it to my car, and it started immediately. After the engine starts, the device starts beeping under the hood, but stops once it's disconnected. I mentioned my hands, because this was easy for me to do on my own. I drove my car for about an hour, then stopped at a store, my car wouldn't start again, and I definitely would have been stranded, but I popped the hood and just jumped it again. Started right away. I still need to go to my service center next week, but I don't need a tow. This is an incredible value, easy to use, and is definitely worth considering for emergency kits. I didn't see a lot of verified purchase reviews on this when I was comparing products, so I hope this helps someone.

I am a former mechanic, dealership manager, and truck parts salesperson. I never thought these would work but I got a deal on the first one because I worked for a website they were advertising on. I have collector cars that sit for extended periods, and often the batteries die. This Jumpstarter never failed me. The ION boost V10 has started cars so weak the horns wouldn't blow. I have two older Cadillacs now and intend to keep one in each car. BTW, it has worked well on less than a full charge!

After receiving this jump starter, I fully charged it and placed it in my vehicle. Several months ago, I used it to jump start a car battery. I then attempted to recharge it and was unsuccessful. The jump starter will not charge, and I exhausted any troubleshooting efforts. I only got one use out of this device, what a waste of money. I cannot recommend this brand for any of their products!

Small foot print, very powerful, easy to use, and great value! Not leaving home without it, but great to have at home for those inconvenient times when convenience is key!

I'll tell ya — one of the single best adds to the toolbox ever. I love this thing. It's bailed me out numerous times and made me look like Superman to friends, instantly starting fully dead batteries. I swear by it. Comes with an easily-stored zippered hard case too. Can't say enough about it.

Brilliant & easy...exemplary piece of engineering.

Worked great for the first few months. The battery started to swell right before the 1 year mark. Did not last long enough for the price.