so i just bought a ipv2 the hype got me intrigued. i ordered one it came with the icr 18650 battery. i cannot vape 50 watts or even 40 watts for more than 4 seconds is this because of the battery? olso the batteries i see that are labled on the net as the icr 18650 are pink or purple mine is grey. is this i chinese knock off battery. sorry probanly a newb question but i guess i kinda am with these box mods.