According to a study by Purdue University in the United States, The "fast charge" function degrades the lithium-ion batteries faster. The components are damaged faster and damage the devices earlier than expected.
This works what The reason is that the electrodes in the battery are polarized, which reduces load capacity. "Each time the battery is charged, the lithium ions move back and forth between a positive electrode and a negative electrode which, when interacting with the particles in the electrodes, causes them to break or break down along the electrode., they explain.
Another disadvantage is that the damage produced by the "fast charge" function is not reversible. In this way, the user has no choice but to buy a new battery or replace equipment before time.