Polymer Li-ion Battery manufacturer / supplier in China, offering 500815-47 mAh 501015 3.7V 50mAh Rechargeable Lithium Polymer Battery for MP4 Bluetooth Earphone Video Pen GPS Walkie Talkie Smart Watch 501115, Lithium-Ion 10 -30PCS Battery 501010 501012 401010 401012 400912 450912 3.7V 35mAh Lipo Lithium Batteries for Bluetooth Headset Rechargeable, Lithium Ion Battery 421113-43mAh Pl412120h Li-ion Battery for Huami Amazfit Gtr 42mm A1909 A1910 412120 Pl412120V Smart Sport Watch Batteries Warranty + Track N and so on.