Need to use USB OTG while charging

[jacobschooley]

Is there any way I can use USB OTG while simultaneously charging my new Nexus 7? I want to get this cable (Amazon.com : Micro USB Host OTG Cable with Micro USB Power for Samsung i9100 i9300 i9220 i9250 by AtomicMarket : Micro Usb Host Otg Cable W/Usb Power : Computers & Accessories), so I can hook up this ethernet adapter instead of using the wifi (Amazon.com : BobjGear USB to RJ45 Compact Fast Ethernet Adapter made for Android Tablets; also works with Ultrabooks, Windows, Linux, Mac, ChromeOS, Android TV Sticks MK802, MK808, UG802, UG007, iMito, Favi. BobjGear One Year Adapter Limited Warranty), but other reviews have said that I'd need a custom rom, and I do not want to get a custom rom because I want to use Android 4.3. Any way to make this work?