Cyborg zombie evolution

Step 8 It's alive!

Feed the cyborg zombie its first battery and see how it brings the spark of life/light into its eye!

So how does this fit in the "Battery Powered Contest"? Well, for starters it is a fun way to drain the last life out of your primary batteries before recycling them and replace them by rechargeable batteries.

However, as this cyborg zombie is likely to be adopted as a guardian protecting a child's room against less cute cyborgs, zombies and other monsters, after a while you'd better feed it rechargeable batteries.

Note on the on the use of "draining circuits" like the joule thief on rechargeable batteries: normally discharging rechargeable is preferably limited to a 1 or 0,9 V. I did not find any information on just how harmful discharging to lower voltages, actually is to modern rechargeable batteries. It is however clear that many applications also drain the batteries lower than 0,9 V, without any obvious damage on the short term (e.g. solar garden lights). Anyway, polarity reversal, always reported to be really harmful, is excluded as we are working with a single cell.