You can help clean up this page by correcting spelling and grammar, removing factual errors and rewriting sections to ensure they are clear and concise, and moving some elements when appropriate. Please notify the administrators before removing this template. Handheld Portal Device. For her Science Fair project, she made a potato battery similar to one she had made in school one year prior to that. According to the psychological profile in her personnel file, Chell is "abnormally stubborn" and refuses to ever give up, no matter how daunting the challenge.