15V Alternate with the following models：

15V

The product Microsoft 15V is perfectly compatible with the product model Microsoft Surface Book 1798 Enhanced Edition i7 :

Microsoft Surface Book 1798 Enhanced Edition i7
Package Include:
AC Power Adapter x1
Power Cord x 1(US,UK,EU,AU standard is available,and we we will choose one fit your country)

http://pc-laptop.co/microsoft-power_supply-15V-p179435.htm

You may also want to see this adapter:

Adapter for Microsoft Surface Book 1798 Enhanced Edition i7