Sorry to hear you have also suffered from the same horrible experience.
Unfortunately, I determined that my Neato really was "dead", and that the batteries were not at fault: I bought a new unit from the local Target, swapped batteries, but my original Neato still did not work. The older batteries powered the new Neato just fine.
I can't express how disappointed I was that Neato (the company) would treat one of its earliest customers that way. You would think that they would APPRECIATE people like me, who can afford to spend $400 on a brand new unproven product. A person who other people seek "gadget" advice from. Do you have any idea how many houseguests marveled at the "laser powered vacuum"??
Before buying that Neato, I literally had owned every generation of Roomba since the very first. iRobot
was very good to me. After that one horrible experience with Neato (the company), I don't expect I will be purchasing any more of their products.
I returned the Target Neato, and now am completely Neato-less. I can't support a company that treats their customers that way. My "dead" Neato is in a box in the basement.