we chronically supply lithium-ion cylindrical 18650 battery cells, include sanyo,panasonci,sony,molicel,lg chem,samsung sdis. product name : panasonic lithium-ion rechargeable battery model : panasonic cgr18650af . norminal capacity : 2050mah . nominal voltage : 3.6 v . diameter : max 18.6+0/-0.7mm . height : max 65.20/-1.0mm . weight(typical) : 42 g . after a fresh battery has been charged at constant voltage/constant current (4.2 v, 1365ma (max), 1 ooma cut-off, 25'c), the average of the capacity (ending voltage of 3 v at 25'c) that is discharged at a standard current (39oma). features: high energy density, high capacity, light weight, high power (wide temp.range), over 500 cycles, cylindrical and prismatic styles.