Genuine SAMSUNG Battery for NP950QDB, NP950QED, NP950XDB, NP950XDC Series. BA4300398A, PBMN4VN, AAPBMN4VN. Samsung Galaxy Book Pro 360 15.6". They have been tested and certified OK. They may have undergone maintenance cycles (typically 1-3) to keep them in good condition.
eBay