These cells are the same as those used in some of the best E: vehicles in the world.
The battery is the energy storing enclosed in the downtube of the cycle. The cells have tested a life of 2000 cycle which give you a life of min. 4-5 years with 2 years warranty.
The multi color LCD display on the bike is used to switch between the various riding mode on the Ebike.
It also indicates the battery charge level on the bike and the present driving mode.