Board Thread:Questions and Answers/@comment-74.171.223.217-20130506233341/@comment-11462520-20130719001300

Heatfreak11 is right. As stated by feedback himself on the series, he needs to absorb energy to fight or shoot it later. Even if he seems to be able to shoot without absorbing first, this could be just "remaining energy" within the aliens' body (like when you use the battery of a computer; it can last a big time, but eventually the computer will run out of power and will turn off).