Well after 15 months and 3 Provari's I seem to have my first issue. One of my Provari's has started reading the battery voltage incorrectly. Off the charger it reads 3.9v instead of 4.2v and after about two hours it starts blinking, telling me the battery is low. It shows 3.4 volts when the battery is actually at 3.8-3.9 volts. Odd. I guess I'll be sending it in for a tuneup unless someone out there knows why this has started happening and has a "fix" for it.