This is a CR2032 type CMOS BIOS battery, which is a small, round lithium-ion (Li-ion) battery with a voltage of 3V. It is commonly used in laptops, such as the Turbox W253es model, to power the CMOS (Complementary Metal-Oxide-Semiconductor) memory that stores the BIOS (Basic Input/Output System) settings when the computer is turned off or disconnected from the power supply. These settings include information such as the boot order of devices, hardware settings, and system time. The CR2032 battery is a common and widely available button battery, known for its long lifespan and stable power supply that ensures the preservation of critical BIOS settings in the Turbox W253es laptop. Replacing this battery may be necessary after several years of use, when it begins to weaken, leading to issues such as BIOS settings reset or loss of system time.