ASUS 0B200-03910000 is a replacement battery listed for the ASUS X415 notebook. The item is marked ATL POLY C21N1818, a reference that helps distinguish it from other ASUS battery listings.
Its construction/reference designation is DYNA/615383/2S1P. The listed electrical specifications are 7.7 V and 37 Wh, useful for checking the battery details against the intended notebook line.
The distributor classifies this as an original ASUS part. It is the battery component for the specified notebook line, not a charger or external power supply.