This is a high-capacity 18650 lithium battery with excellent low-temperature performance. It features a nominal capacity of 3800mAh and a nominal voltage of 3.6V. The battery can discharge stably at a low temperature down to -40℃, suitable for outdoor equipment, industrial instruments, and low-temperature environment applications. It has reliable safety performance and stable discharge characteristics, meeting the power supply requirements of various electronic devices under extreme temperature conditions.