Instruction: Answer the given question using the supporting document.

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Question: Does the cable charge your device when your device is playing video?
Document: Display out works just great on nexus7 2013 but it does not charge my nexus.I'm using the stock cable to charge and the battery percentage drops.
Did not work with my Nexus 7 2013 and older Sony KE-42TS2U HDTV after lengthy research. I ended up running a long DVI wire from my PC's second video output  rather than waste my time trying to troubleshoot this device, as it seems several people are experiencing problems with them. Return went smoothly.
Works as expected. I use a Nexus 4 with Android 4.4.4 and I Test this device with a HDMI to dvi-d cable adapter and works fine.
It's a never-ending scramble to be able to connect your devices to flat screen TVs and this device is as simple as it gets. Plug it into your SlimPort tablet (mine is a Nexus 7 from the Google Fiber install) and your tablet output is ready for displaying on your flat screen TVs and monitors via an HDMI cable. Pictures, videos, webshots, presentations show up on the screen just as they appear on the tablet.
Worked great on an old Samsung and newer lg. Have streamed several hours of Netflix now with no issues. On a 2013 nexus 7 using the OEM charger plugged into the slimport, it charges during streamingTwo points for those with issues.Turn everything off. Plug everything in. Turn on tv and set to HDMI input. Turn on device. It should show up once booted. If not, unplug HDMI cable and retry without turning tablet off.
Its a good thing you dont need a power source for the slimports. You also have the option to charge it if you want to. Overall my experience with the service and the item is excellent (10/10). I will surely be buying more from this seller. Thank you so much for your service.
Just be careful if you unplugg it while you are playing something. I did this and when I plugged it again the sound came from the phone instead of the TV, but it was temporary. But it, you won't regret it.
Tried a competitor's brand here from Amazon, it worked for video and audio, but upon plugging it in, my GPS died every time, the whole point of this setup was to use GPS on my headunit which didn't work.I went to a local store and bought the Accell Slimport to HDMI adapter - had to look everywhere for a slimport, I actually bought 2 different adapters, the accell and one other brand as I wasn't going to drive another 30 minutes to the only store around to have one.
This Accell slimport is my 2nd attempt. Trying it out for several weeks on my 2013 Nexus 7 and a Sharp HDTV, it has worked perfectly. My first purchase was a cheap knockout version by VicTsing which had numerous quality, connecting fitting, video and audio issues.This one fits the connectors perfectly with no room to wiggle. Watching a movie with the Nexus 7 charging plug connected, the Nexus 7 battery level pretty much stays the same and the charging power is mainly used by the slimport for video viewing.
I bought this to use with my Nexus 7 2013 because anyone who owns the nexus 7 will tell you the Wireless Display feature just sucks on it, too much lag and buffering. This little device does the trick no lag no buffering perfect mirroring. Opted for the Accell over others, because when I went to Slimports web site they linked me to this brand. Price was right on target that I bought 2 of them. Very portable to take on vacation with you.
Answer: Yes and No, it does charge when you connect a micro-usb but it won't provide enough power to keep battery from draining or enough to actually charge the device. It pretty much with provide just enough power to keep you watching. That aside it is very useful to use device on TV just make sure you use HDMI cable that will work the newer standard ones work otherwise you will end up with bad experience.