Max LR atty Voltage before toasting them?

[Rambosmurf]

Anybody have a idea at what should be the max voltage to run the LR atomizers at. I have a Buzz and use the LR attys at 4.0-4.2 without toasting them Yet, but some are 1.8's, 2.1, 2.0, etc and was wondering when I get in the danger zone. Thanks
RS

 

[Chingas]

This a pretty cool thread I keep bookmarked. Atomizer + Voltage = Watts chart. Scroll down about 5 posts to see the chart.