I have one and have not needed you use it yet but I check the charge every couple of months and it holds up well. It's the GOOLOO 650A. It's rubberized, has a bright flashlight built in and seems well made.
Previously, I had ordered a different GOOLOO (600A) that had a hard plastic shell. It broke immediately after opening it so I returned it. That unit is no longer available on Amazon.
Not much of a review but the one I now have seems good.