Penstyle batteries last the longest, and Janty KISSbox, Sedansa, and ePuffer batteries have extra long lives.
		
		
	 
 
my geneic penstyle battery can last one day I don;t know how u all judge here
 
but if I use for one day I do noticed performance drop especially produced the vapour I like to see lots of vapour ..I hate to see if I inhale don;t have  much vapour thus 
 
I noticed if a newly charged battery I used around late mid of the day the performance drop maybe I constant using here as the vapour getting lesser at first I thought what penstyle cart so fast finish??impossible 
than put in a new battery it can produce better vapour again "but of cos sometime due to the liquid going to finish"