2 days of operation but less of usage because of charging. Picked it up, hit the fire button resulted in a soft popping noise and it went dead. Opening up the box there was that faint ozone smell of blown circuit. Fuse still seems fine as is the lipo pack and I can't see any visible damage to the board components. Doesn't connect/power up on USB either with or without battery still attached. Escribe also doesn't see it so it's basically completely dead. I can join the throng of folks with a dead DNA200. Waiting to hear from evolv about RMA.