I have both the dry herb atomizer and the concentrate atomizer. They each have their own battery and I wear both of them around my neck. I hardly ever use my pipe anymore because the dry herb atomizer is such a pleasure to smoke from. One of my batteries is 6 years old and it still works as good as my new one. I use it for the concentrate. I've been an engineer in the hi-tech world of non-consumer electronics. The space program, medical, etc. I rate this product above the typical consumer equipment. It is hi-tech and built to last. Extreme value for the money.
Sincerely,
A very satisfied customer
