Explanation of icon.
 Lithium Ion
Function name: Lithium Ion

Voltage : 3.6V/cell

Keeping Quality : Necessary to supplementarily charge (desirable to be kept in the state of partial discharge)

Price : more expensive than Nickel

Charge Characteristic : constant voltage & constant current

Full-Charge Detection : difficult

Memory Effect : non-susceptible

Large Amount of Power Discharge : meagerer than Nickel Metal Hydride