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I own pic related
Have not tested it with a laptop, but it claims to charge one.
I have tested this with jumping the car and charging a phone they both work great. I had a shitty battery and used it to jump about 5 times before charging it again.
There is one major drawback though. If you leave this thing sitting in a hot vehicle the battery will swell up. Mine still works but it is swollen. the manual that comes with it says don't exceed 70 C.