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

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

First let me say read the review from Tac Medic.. Second, This is the best jump box EVER!! It is made NOT TO HOLD A CHARGE!!! You charge it by hooking it up to the low battery. If that battery only has 5% this will take a charge from that and basically turn that 5% of power into 100% IE enough power to jump start your vehicle. You can charge back to 100% once the vehicle has started but it WILL NOT hold the charge for more than a day or two. This is my second one because people suck and broke into my jeep and stole my first one!! I used my original in all types of weather and all types of vehicles and it never failed. Even on diesel trucks that require you to wait because of glow plugs. It literally took about 3-4 minutes to fully charge and always started the vehicle 1st time if it was actually a battery problem. Read the directions people!! This will not fail you!!

The people writing bad reviews think this unit has a battery. It does not have a battery. It's a capacitor. Capacitors do charge kinda like a battery but they dump all their energy in a fast release. This unit gives a 25 second release of energy which should be long enough to start your vehicle. The capacitor doesn't need to be stored fully charged like a battery jumper. A low car battery will charge your capacitor in less than 5 minutes. Jump your vehicle and put it away. Unlike a battery, this capacitor jumper should last much longer than battery chargers because batteries go bad over time. How often to you replace the capacitor on your pool pump or your AC unit? Thousands of starts every year. You're going to be mighty upset if you plug this in and charge it like a battery pack. It doesn't need to be stored with a full charge. The concept of capacitor jump starters takes some understanding about capacitors. But if you think it will behave like a battery, you'll just write a poor review and send it back. The only draw back would be those who like to charge their phones or iPads like battery chargers do. This is NOT A BATTERY.

A little finicky, but it works

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.

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