smoke stick v8

Every time I click on the power button on my Smok Stick V8 it flashes 4 times. Also, whenever I charge it the light won’t go on so i don’t know if it’s charging or not. what does this mean?

hi there, i recently bought a smoke stick v8 and i have 3 packs of m2 0.15 ohm coils (couldn't get the 0.25)..now i was worrying if i do something dangerous... even if they sell those things like "made for the stick v8" ..so if one uses ohms low ..it would mean on a direct 3.7 volt output with...