Gurren Lagann Box set Core Drill

[Reno2003]

Hi, I just want to know if anyone else has this drill and if so, do you know if it comes apart to change the battery? If anyone has gotten this thing apart, I'd like to know how you did it without breaking it. My goal is to make the drill pulse instead of just stay on when you flip the switch. I'll post a tutorial on how to do it once I figure it out, if anyone is interested.