I did a video on the Hi-Power cells to show a few things about bloated cells from over charge or discharge. It was an interesting thing to note that these cells have no vent. When I opened them up there was no residual pressure but the cell remained bloated and was unable to squeeze the cell back to normal. Internal pressure was not what was keeping these cells bloated. We have one more to open that was seriously bloated from over discharge and still holds a charge.