I did a brief stint as a research assistant at a battery manufacturer which is why I was so horrified by your comment. Essentially, from the moment you manufac

I did a brief stint as a research assistant at a battery manufacturer which is why I was so horrified by your comment. Essentially, from the moment you manufacture a lithium-ion cell, the materials inside start reacting and losing capacity. When fully discharged, this reaction rate is increased by quite a bit. The capacity of a lithium cell is dependent on the minimum and maximum charge voltages. These are chosen to balance the capacity of the cell, as well as the cycle life of the cell. It is assumed that you will only run the cell to 0% on the rare occasion, otherwise that you will charge it before it gets too low. FYI, Battery university is a good resource on just about everything batteries [1]. My advice when it comes to caring for the battery in your phone is incredibly simple: Plug the device in each night when you go to bed and unplug it when you get up in the morning. [1] http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries http://batteryuniversity.com/learn/article/how_to_prolong_li...