I found this cable for the Android HTC... It claims the following:
Video signal is put out through RGB standard output while keeping your devices' battery charging.
This cable also features an extra Micro-USB charging socket which is built into the side of the plug of the cable, so you can be sure your device stays charged.
Features:
Micro USB
Left, Right audio and Video RCA
In-line Ext Micro-USB charging socket on plug
http://www.shopandro.../5A205A7232.htm