... effect 3.UL,CE 4.professional workers lithium ion batteries for sale 2000mAh 3.7v 3.7v Lipo battery,Li-polymer battery ... pack,battery pack,high capacity battery LiPo Battery for PortableAdvantage of lithium ion batteries for sale 2000mAh 3.7v :1.Long cycle life ... battery,E-scooter battery,EV battery,UPS batteryetc.Marketing and Factory Tour :Quality Approval:Culture: