18650 battery manufacturer / supplier in China, offering OEM ODM 5s1p 18650 Battery Solution UL CE Certified, Stable 22.2V 6400mAh 6s2p Lithium Battery Pack for Outdoor Bluetooth Speaker, 3.7V 3200mAh 18650 Lithium Ion Battery with Overcharge Protection for Power Banks/Flashlights and so on.