so im gonna order a provari, my question is, what kinda battery life am i looking at with the 18490, i only ask cause i like the 18490 end cap on the black chrome better than the extended cap. i have an IMR 18650 in my lava tube right now and i can prolly get a day and a half out of the batts my vape pace. if i can get a full day out of the 18490's ill just get those.