Autonomous Hexy II

I started a new topic to fix the spelling of the title and to ask a new question. I fixed all the bugs, replaced my fifth servo, and now hexy stands on its own. My new problem is that when it runs tethered to the computer, it rises and then shuts down since this is all in setup. This is what I want. When I disconnect it from the computer, it resets and goes through the “get up” cycle repeatedly. Is this due to my running off the one supply? Can I run the logic off a 9V battery or do I just need some filtering like a capacitor in parallel with the battery? Does anyone have a light power pack (maybe lithium) to add to hexy? I am worried about adding too much weight.
Docbill

9v for the logic supply works