Exploded on the second connection of 5S Lipo. The first flight was great, I landed, pocketed the new pack and a nice fireball was fired from this ESC and stack. The ESC failed in the short position, killing my flight controller as well as the DJI air device attached to it. Avoid these regulators at all costs. Don't wreck $200 electronics over a $2 regulator. Choose Pololu or another well-known BEC manufacturer.