I'm building a robot and powering it with a Raspberry Pi. I am looking at this battery pack, but I am flexible with which one to use.
My problem is that I need to be able to charge the robot while it is still on, and apparently that is not good for a single battery pack to be charging while being used (they seemed to say so in the video). Am I wrong? Otherwise, how could I go about charging the robot while keeping the Raspberry Pi running?
EDIT: This is my first robot (other than my lego NXT kit), so I don't have any prior experience with robot batteries.