After upgrading to Window 10 April 2018 Update, select devices with Toshiba XG4 Series, Toshiba XG5 Series or Toshiba BG3 Series solid state disk (SSD) drives may exhibit lower battery life.
Microsoft is working with OEM partners and Toshiba to identify and block devices with Toshiba XG5 Series or Toshiba BG3 Series solid state disk (SSD) from installing the April 2018 Update due to a known incompatibility that may cause battery performance issues.
Microsoft estimates the release date for the resolution for this issue to be available in early June.