I received my Davinci with a battery that didn't work. The customer service team was very helpful in helping to get a "new" battery sent to me right away. The "new' battery doesn't work properly, it doesn't hold a charge. I assume, my unit shuts down after 2 to 3 puffs with the temperature on 2! I don't have the time to keep reaching out to their customer service team in order to get my unit working properly. I'm not pleased with this purchase. I will not purchase anything else as this entity has proven to not work for more than two to 3 minutes, with a supposed new battery. Sorry, I'm taking my money to Firefly, hopefully I'll have better luck with their unit. Tai Love Disappointed customer.