KeenPower 6000A Super Capacitor Jump Starter for All 12V Cars, Jump Box

I've had a lot of battery jump starters over the years and it's a pain to keep them charged up. I started researching options and found this super capacitor jump starter. Little did I know I would need it that week. My car did not start one morning. I connected it up, let the capacitors charge up to 100%, hit the button, and started my car right up. Tried it on my SxS that was dead and it started it right up. Tried it on my 2006 F450 that was dead...worked great. Tried it on my big Diesel RV with completely dead batteries and.... okay, I will say, it started it...sluggish but it started it....however, the cables were EXTREMELY hot and it smoked a little and smelled like it was burning.... so my only suggestion would be to put bigger cables and better clamps that can handle something like a big Diesel. Yes, I have a lot of equipment that just sits and the batteries die. This is perfect for what I need and you NEVER have to worry about keeping this jump starter charged up. It will use the little juice left in your batteries to pull it into the capacitors. I loved this device so much, I purchased a second one, then a third one for a Christmas present for my parents. I highly recommend this jump starter.

Working as its supposed to . Nice back up even for the semi truck

I bought this thing on a whim because I like the idea of not having a Lithiom ion BATTERY jumper sitting in the hot car all day (South Florida). Im not one to make reviews until I get to actually test the product and low and behold the battery on my 3.8 liter V6 palisade died on me a week after getting this. There were certain things I wanted info on before buying this so I'd like to relay my answers in case anybody else is interested. 1. I wanted to know how long the charge lasts after charging. I charged it to 100% when received 1/3/26 and kept track every couple of days the percentage. It stayed at 100% for about two days then dropped 2-3% each day. This gives more than enough time to charge then transport to a friend/family member with a dead battery. 2. I also wanted to know if the ability to jump a car at around 5% was true 3. I wanted to know if it could jump start a car WITH NO BATTERY. Low and behold all are true. When changing out my battery I discharged it completely then charged it to 7% with my old battery which registered at 11.2 volts. I then moved the 7% device to my car and jump started it perfectly fine (with NO battery). So far im very happy with it and will likely get a second for my wife's car.

A little finicky, but it works

This product jumpstarted a 2015 Peterbilt 579 with no problem. I would recommend this product.

Excelente

Cumple lo ofrecido

Failed after two uses. Not a good quality product. Wont purchase again

Very useful don’t have to worry about hot or cold damaging the booster works every time recommend