5B20S72292 per Lenovo ThinkPad E14 NM-C421 con scheda madre computer portatile i7-10510U RX640
5B20S72292 For Lenovo Laptop ThinkPad E14 NM-C421 w/ I7-10510U RX640 Motherboard. Due to transportation safety, CMOS battery cannot be installed normally. box contains: is only one motherboard. For Lenovo:9000XXXX or FRU.