Secondary (rechargeable) batteries in which the lithium ions move between anode and the cathode, used in mobile phones and laptops are called what?

• A. Battery
• B. Lithium Battery
• C. Lithium Ion Batteries
• D. Lithium Metal Batteries

Answer: (C)

Rechargeable lithium-based cells where lithium ions shuttle between the anode and the cathode are lithium-ion batteries. In phones and laptops, this chemistry is used because it delivers high energy density and good cycle life. During discharge, lithium ions move from the anode (often graphite) to the cathode through the electrolyte, while electrons flow through the external circuit to power the device. When charging, the ions move back to the anode as the charger supplies energy. This ion-shuttling behavior specifically defines lithium-ion batteries, making them distinct from a generic battery, non-rechargeable lithium batteries, or lithium metal batteries (which use a lithium metal anode and are not the standard in consumer electronics).