Keenpower Portable 12V Car Jump Starter Emergency Battery Booster Pack Charging Outputs (Black/Red/Yellow) B900

I bought this for my wife. The old, heavy and bulky, easy to make a mistake one she had wouldn't hold a charge anymore. She loves this new unit because it ABSOLUTELY prevents her from hooking it up wrong. Even the battery clamps are well made and designed to prevent shorting out. The fact that it is compact, light weight, has a great carrying case, will run/charge every electronic device (you get connectors for everything) around, and delivers strong long lasting power makes it truly perfect for everyone. This is the unit I will buy for myself as soon as the heavy and bulky, easy to make a mistake one I have dies.

Excellent device. Have an old 3rd vehicle with V6 I hadn't driven in a while. Battery was shot. Tried to jump start it with another vehicle but never got it to start. I used this power pack and it started right up. I had to make two more stops along the way to get the new battery and it worked every time. I believe I used it for 6 starts and the power indicator only got down to 5% charged.

Prior to this I had two different chargers for our cars. Mine was a Tenergy Storm LiFePO4 based unit that is now 3.5 years old & my wife had an Anker Li-Ion based unit that was also 3.5 years old. Her unit had batteries that puffed up (double in size) so since my LiFePO4 based unit was still functioning my mind was made up to find her a unit that used the same kind of battery technology.This jumper Starter was the answer & will be the one I buy (hopefully after 5+ years with the other LiFePO4 model). We haven't had to put this one to the test yet. We did charge it for about an hour as it wasn't fully charged when it arrived. I like the addition of the Ec5 socket adapter which should make plugging in some other devices easier. I can use the various tips that came with the Anker unit for this one (if we need to).

I got this as a Christmas gift and got to test it out yesterday after my battery died coming out of the grocery store. It started my car immediately and was super easy to use. Hold the power button until the lights come on then when your ready to jump the car hit the vehicle button until you see a green light. I used it again this morning to jump my car to go get a new battery. I'm going to buy a second one to keep in my truck.

This might work for something small like a lawnmower, but it did nothing for my car. I'll probably use it for other things like camping.

I bought this for my daughter who went off to college and I didnt want her to be stranded and ask a stranger for a jump. Needless to say the opportunity arose with a bad battery and my 18yo was able to jump start her car and get to an automotive store.

Charged. Put away for about three months. Needed to jump neighbor's Prius that had a completely dead battery. Started right up.

Did not charge, would not recommend it.