Lenovo Battery 3V CR2016 2 Pin

Lenovo 04X0443 is a laptop CMOS and real-time clock (RTC) battery. It serves the system clock and CMOS settings, rather than powering the laptop during use.

While the laptop is off or unpowered, the battery helps maintain its clock and CMOS settings, preserving the stored configuration between sessions.

The compatibility listing includes ThinkPad 11e (5th Gen), ThinkPad Helix, ThinkPad P1 Gen 1 and ThinkPad X1 Carbon 2nd Gen, as well as other ThinkPad and Yoga models. Listed types include 20CG and 20CH for ThinkPad Helix, and 20A7 and 20A8 for ThinkPad X1 Carbon 2nd Gen.

This component is intended for laptop service when replacing an RTC/CMOS battery, helping maintain clock and configuration data while a compatible computer is switched off or without power.