I've given up on the LiPo flavor of those things. 100% of the ones I've owned have failed after 2 years. The latest one I purchased at Costco could not even start my ATV.
It's really difficult to determine the quality of the cells they use.
My truck's battery was dead from sitting a few weeks. Hooked up the trusty [sarcasm] lithium jump starter and the headlights came on nice and bright. The engine cranked for 1/2 second, then stopped and the pack showed no signs of life. Utterly useless.
I'm quite sure one could be produced with cells that don't degrade rapidly. They cost much more. LiFePo4 is the common term for ones that "might" last.
Even then, they don't get great reviews. https://www.amazon.com/EarthX-Jump-Pack-LiFePo4-Starter/dp/B0188VFMH8