That is the standard wrapper for ultrafire cells (Protected or not). I do address it in the article linked at the bottom.
There is also the detail that it is the (non existing) PCB that will last 10 years, not the battery.
That is the standard wrapper for ultrafire cells (Protected or not). I do address it in the article linked at the bottom.
There is also the detail that it is the (non existing) PCB that will last 10 years, not the battery.