18650 Li-ion Battery Introduce: 1,High Operatiing Voltage: 3.7V. 2,Energy Density Is High, It Attains Volumetric. Energy Density Of 3600Wh/L And Gravimetric, Energy Density Of 135Wh/kg. 3,No Memory Effect. 4,self-discharge Is Less Than 10% Per M ...Read More