So far I have used 14 of the new boards and only had problems with one and that was due to too much voltage. They can only take around 6 volts before components on the board start to fry. That is why I only use 4 AAA Akaline (6 Volts) or use 2 Li-Ions and a 5 volt regulator and use a PNP transistor to get a bright blade. Normally using 6 volts with out a PNP transistor or 5 volt regulator with a PNP transistor, I get a decent blade and the board is pretty stable.