Cookies Battery capacity:900mah , 3.3v-3.8v-4.3v-4.8v Thread: 510 ,Protection: short circuit, Preheating time: 15s. High quality, conact me for vip price! we are from the facotry ,we have been specializing in e cig more than 10 years Our products have passed CE, ROHS. Every product from our factory is under strict quality controlled before delivery to customers. Support OEM Service ,pls conact Seller first for custom made items, Looking forward to building a long-term busniess relationship.