It seems like a lot of those devices use off the shelf batteries. I had an air compressor that would not charge. Since I was about to toss it anyway, I opened it up. A day later after an Amazon order, and the air compressor is back up and running.
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We bought a couple from Costco when they were on sale. Never had problems with them, but we routinely check the charge on them and don’t travel far.
Type S Lithium Jump Starter Portable Power Bank with LED Flashlight https://www.costco.com/Type-S-Lithiu...100425276.html
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If this is the one you're talking about
https://www.amazon.com/NOCO-GB40-Ult...-1-spons&psc=1
I have it and recently used it without issue, started up my Nissan Titan with no issue. I just set a bi-monthly reminder on my phone to bring it in the house and recharge it.