Liyuan supplies rechargeable 3.7V lithium battery cells in several sizes: 1500mAh (model 4025130), 8000mAh (9060100) and 10,000mAh (1260110). In this naming style the model number typically indicates the cell's thickness, width and length in millimetres, so 4025130 is a slim cell roughly 4 mm thick, 25 mm wide and 130 mm long. Thin, flat cells like these are popular in portable electronics, smart devices, power banks, wearables and other products where space is limited, while higher-capacity versions deliver longer run time. Equipment makers can choose the size that fits their enclosure and the capacity that meets their battery-life target.