BRAND NEW: ENERGYFLO BATTERY-LESS JUMP STARTER! (C-4 ( 450A ))

This unit is small in size. I used my Lincoln Town car battery to charge it initially while the engine was running. There is NO safety equipment; ie: no cross connect protection, no off switch. It's basically is like a truck battery with jumper cables.. This is not for amateurs, this is a professional unit. 2500 amps peak power! You can weld with this unit. You MUST take care not to touch the cables together, just like a real battery. When I put the cables on the battery, there was a big spark due to the power flowing into the device. The lights on my Lincoln went dim and the alternator whined a whole lot. Charged the pack to full in about 10 seconds. My neighbor has a big deisel truck with a weak battery. It was 20 F outside and his deisel was barely turning over. I clamped this on and his deisel engine cranked like the battery was fully charged and it was 80F outside. That was the first time I used it. This little thing is a MONSTER. It would be recommended for towing companies. As much power as it has, it only weighs 10 pounds. I wouldn't recommend it unless you really know what you are doing. This is NO toy, you can really get seriously injured if you connect it backwards. 2500 peak amps is more power than any car battery. I have used all kinds of different jump packs, they are all junk compared to this unit. Definitely a high quality unit.

Suckered into this one. Who knew. Capacitors are way cheap and under rated. They drain off so fast that the car cannot start. It only charges off of a full charge battery. Don’t get me started on this one. The saddest part of this bad deal is that it’s made in the USA

DO NOT BUY WILL NOT LAST LONG