YUNTONG Power Co Ltd. One of China's leading professional battery manufacturers since 1992, we started out supplying sealed lead-acid battery, expanding to NiMH/NICD, lithium-ion and lithium-polymer batteries. We produce batteries that meet UL/CE approvals and the RoHS standard. Marketed under our "YUNTONG" brand, our batteries are well received in the US, Europe, Australia, and Japan.