Genuine Lenovo Battery Not Attached, got this pop-up after 1 year of use without any problem, anyone got a solution? The batter is from Sanyo. : r/ thinkpad
Battery-not-charging-not-detected-etc - English Community - LENOVO COMMUNITY
Is your ThinkPad's USB-C port not working? Upgrade its firmware. - CNET
Battery Not Charging on Lenovo Thinkpad: How to Fix