You could take a look at the Screwdriver MKII. Not the best for out and about as it is quite big but they are very well made and the batteries last for an age. I have one and quite like it.
That said however, I have gone back to using my KR808D-1 as my main vaping device so maybe look into one of those as well.
That said however, I have gone back to using my KR808D-1 as my main vaping device so maybe look into one of those as well.