A few days ago, I built a device holder to place as many devices as possible on my desk without losing my sanity (https://medium.com/@hamen/first-hardware-project-of-2016-device-holder-4ef25670c507).
One more step in that direction is solving the charging issue:
N devices, with turned on screen, wifi and gsm data vs Powered USB Hub
Poor USB Hub cannot win against a Nexus 10: that thing sucks more energy than a black hole.
My solution is a plethora of USB chargers and WiFi ADB connection. We just need Android SDK and its ADB. First thing: list the devices
adb devices -l
With the device list, we can now operate on any particular device. We need to setup the connection port first:
adb -s DEVICE_ID tcpip 5555
Once the port is properly configured, we can connect to the device. We need to know the device current IP address and we can find it in:
Settings -> Wi-Fi -> Advanced (in toolbar menu)
We can now connect to the device like this:
adb -s DEVICE_ID connect DEVICE_IP
Ready to go! Fire up Android Studio and run your app.
If you want to go back to USB ADB, you can reboot your device or use: