Hi RP,

That's useful information to know, thank you for sharing!  I`ve connected things the same way during development with the Summit, but luckily never killed anything.
My board is powered by two Li-ion batteries in series. I`m currently testing powering the Overo via a linear regulator, on the theory that the switching regulator could be causing problems when I plug the batteries in.  

Paul Nolan, CEO Idruna Software Inc.