Citric Juices
It may just be that the Citric
juice I used gunked up the coil faster due to sweeteners or flavouring ingredients.
Ceramic Coils
I believe it's Vaporshark (?) that does studies on everything they sell. Either way, when I looked into it there was issues with ceramic particulates being inhaled by the lab testing machine. When they redid the test there was no issues afterwards. The first study was the one that got more coverage.
Battery
Mine goes up to 100%, but I don't use it while charging.
Ceramic Coil Wattage
Mine also suggest 25-35W with the mod going to 40W. I personally use it on 42.5W and have gone up to 60W.