never mind because i put the on/off switch in the middle. ugh. it says on the website that this battery bank stays on, but it goes to sleep after inactivity. does anyone have any reccomendations on a dual output usb battery bank that charges via a micro usb port and stays on? and is relatively small?

@mitu Thanks but it seems my issue fixed.
I just backup all my roms and bios and format the sd card and reinstall the latest retropie.

Thanks for helping me... This issue is solve by backing up my roms and bios and reinstall the latest retropie image.