I agree that they do perform very well. I really like them a lot and am anxious to replace the one that puffed. LiFePo4 batteries are tough but as I have experienced this weekend, you gotta watch out not to drain them too much. Ignorance on my part as I thought that they could survive very deep discharges. Categorize this as user error
One thing that pleased me is even though this battery was discharged to the point of no return, and after some hard impacts with a hammer, nothing happen that could hurt my soon to be 6 year boy. It puts my mind at ease.