Brand new internal Lenovo thinkpad battery. 01AV430.
I ordered a different Battery but received this one instead. The seller refunded me but told me to keep the battery anyway.
Its suitable for the following models
NOTE: Only fit for X1 Carbon Gen 5 and Gen 6,Not fit for X1 Carbon Gen 1, 2, 3, 4, 7, 8)

For Lenovo ThinkPad X1 Carbon 5th Gen (X1 Carbon 2017) Model 20HR000FUS Series
For Lenovo ThinkPad X1 Carbon 6th Gen (X1 Carbon 2018) Model 20KH002FUS 20KH002JUS 20KH002WUS 20KG0022US 20KH002RUS Series

Lenovo Thinkpad Battery (Dublin 11)