Lenovo 5B10S34082 is a CMOS battery for compatible Lenovo notebooks, helping preserve system time and settings while the notebook is turned off. It serves as an internal replacement part when the existing CMOS battery no longer retains them.
The distributor identifies it as a lithium CR2032 button cell. The part is listed for Lenovo ThinkBook 15 G2 ARE (20VG); iFixit also lists ThinkBook 15 G2 ITL (20VE), ThinkBook 15 G3 ACL (21A4), ThinkBook 15 G3 ITL (21A5), ThinkBook 15 G4 ABA (21DL), ThinkBook 15 G4 IAP (21DJ), and ThinkBook 15 G5 (21JF) as compatible models.