liaoning xinchi lithium technology

21700 Rechargeable Li-ion Battery Cell. 21700 3.2V 3000mAh 21700 3.6v 3200mAh 21700 3.6v 4000mAh 21700 3.6v 4500mAh We are a professional manufacturer of Li-ion Battery Cells - SINC. With 20 years of production experience. Our cells have obtained many safety certifications and transportation certificates. Among them are MSDS, UN38.3 and others. Our cells will undergo many tests before leaving the factory, such as overcharge, over discharge, high temperature test, low temperature test, aging test, impact test, extrusion test, and puncture test.