Device link printed circuit board

I would have expected the inverter to be the weak link in the chain, but it's the battery pack that is so flawed. I charged it up overnight. It had a full charge when I started using it, and it did keep my laptop going for a few hours, ... Obviously there's some weak parts in the main circuit board, based on my own experience, and what I gleaned from other reviews. The Chinese manufacturers apparently didn't test these devices enough (not as much as an American ...