I just purchased a received a Provari about a week ago. I ordered the unit with with the extended cap and 2 AW 18650 3.7v 1600mah batteries. I noticed that after about 1-2 hrs of light to moderate vaping that the button starts flashing slowly (meaning battery low). After about another hour...it flashes fast and shuts down so I have to charge the battery. I use 2ohm Boge cartomizers with the voltage set to around 4.2v. Is it just me, or are you guys getting around the same life out of your batteries too? I was hoping that 1600mah would last me more than 3hrs. I love the Provari...but if this is the battery life I have to look forward to, I may need to look into a different unit. 