I have two orange Imren 40 amp batteries in my Sigelei 100 watt box mod with a .4 ohm built on my Big Budhha. I notice whenever I go above 30 watts I notice a burnt taste and see that the wicks are slightly burnt. I've tried every kind of trouble shooting and wicking method and coils builds up to .6 ohms and tried using my stillare rda with similiar builds but still get the burnt taste. I'm starting to think this burning is caused by the batteries but I'm not sure how?