My name is Casey, and I would be happy to assist you today. This is a characteristic of the device. The device stays lit in dark areas, because it has adjusted to the lack of light, in order for users to navigate through their device in the dark. If you are not worried about missing calls or texts when you go to sleep at night, you could always charge the device with it powered off. I understand, this may not be an option for you, but I was suggesting it, if the light is a nuisance. There is not a way to disable the keys from being lit, unfortunately, and I do apologize for the inconvenience. HTC is investigating ways we can improve the battery life for the EVO. All of our satisfaction surveys are reviewed by HTC, so we can take customers