Electric Heating Socks With 3.7v 2200mah To 3200mah Li-Ion 18650 Rechargeable Battery Cell

Our team walks you through how our 3.7V 2200mAh to 3200mAh li-ion 18650 rechargeable battery cells perform in electric heating socks. In this video, you'll see the complete manufacturing process—from cell selection and PCM welding to insulation, voltage testing, and final packaging—ensuring reliable, safe power for comfortable, long-lasting warmth in demanding conditions.