All our batteries are made with Class A battery cell.It has low -pressure protection, short -circuit protection,Overcharge protection. 100% safe. Different level voltage can realize different vaping experience and preheat function will work for thicker oil. They are compatible with most of the 510 thread cartridges.
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Address: Mingyou Purchasing Center, NO. 168 Baoyuan Road, Bao'an District, 518102 Shenzhen City, Guangdong Province, China