This adapter by Delock can be used to convert a passive MHL cable into a USB cable. Thus the existing MHL cable could be used as USB data and charging cable. Hence you only need one cable.
Τεχνικά Χαρακτηριστικά - Connector: High Speed HDMI-A 19 pin female > USB 2.0 Type-A male - Supports all MHL versions - Only for passive MHL cables without additional power supply - Colour: black - Dimensions (LxWxH): ca. 23.4 x 16.6 x 6.8 mm - OS independent, no driver installation necessary
