Top positive review
These devices work.
February 8, 2019
The belt on my alternator recently went bad causing the battery to gradually lose its charge. I used one of these devices to start my car, with the battery virtually completely dead, at least four times (in the same night). Of course it didn't stay running for long, as it was almost completely dead and receiving no charge from the alternator, but another jumper I have (a Gooloo GP200) started it without any difficulty each time and still had plenty of charge left to go.
I feel it was worth the money as such and feel much better about giving two of them as gifts to family. It works. It does what it's supposed to do. End of story.
My only complaint is that the display on the unit was scuffed up on arrival. As stated earlier, I got three of these jump starters, and all three had display scuffing when I received them. This one more so than any of the others. (This one is a different brand and model than the other two.) I really dislike cosmetic defects on a new product. When I buy something new I want it to look new.
NOTE: READ THE INSTRUCTIONS. There's some very specific and potentially important information regarding use within. I see pictures of people claiming their units caught on fire or blew up, and perhaps that's true, but I'd not be surprised if they disregarded the instructions or didn't read them at all. For example, after jumping my car my father wanted me to leave the unit hooked up to the battery for a while afterward. But the instructions make it very clear this is not an automobile battery charger, and not to do that due to risk of overheating, etc. People often leave cables hooked up for a while after the vehicle starts when jumping car to car, and I'd not be surprised if some people did the same with this. Read the instructions.