The JINTAI Motherboard BIOS battery CMOS for Lenovo ThinkPad X1 Carbon 5th Gen models, specifically 20HQ, 20HR, 20K3, 20K4, and X1 Carbon 6th Gen 20kg, 20KH, X280, 20KE, 20KF, A285, 20MW, and 20MX, provides a vital backup for your critical system components. This set includes a CMOS battery and a BIOS battery, ensuring your system remains operational even when the primary battery loses power. The JINTAI battery is designed to deliver consistent and reliable power, maintaining the correct system configuration and clock settings. This crucial set is compatible with numerous ThinkPad models and offers peace of mind for users who require a robust and dependable solution.