I have an eleaf istick 30w battery. I have a Sense Herakles tank which I use 0.6 coils for. The tank is supposed to be for 30-75watt batteries but my battery only goes up to 30. My sweet spot is around 22watts when hitting it. To get a good hit I have to hold it down for about 8 seconds while it takes a few seconds to "heat up". Not sure if any of this is normal I've been vaping like this for 2 months now I'm rather satisfied with it maybe I'm just so used to it but I wanna know is this SAFE??? 30w battery with a 30-75w tank and the 0.6 coils? Works for me fine, battery does get a little warm after heavy vaping but am I safe here? I just wanna make sure it isn't gonna blow up in my face. I usually charge it with my mophie power station XL with a USB cord. Thank you.