Li-Ion 18650 Cylindrical Rechargeable Battery 3.7V 2600mAh Height: 2.560, Diameter: 0.71 Flat Top Assembly Cells > Li-ION Li-Ion 18650 Cylindrical Rechargeable Battery Features: Higher energy density with optimized electrodes design Flat top cell Free from leakage of liquid electrolyte Low battery internal impedance Specifications: Nominal Capacity: 2600mAh Nominal Voltage: 3.7V Charge Voltage: 4.15V�0.05V WARNING: Use special caution when working with secondary lithium cells, they are very sensitive to charging characteristics and may explode if mishandled Protective Circuit Board is required when making packs Make sure user has enough knowledge on secondary lithium rechargeable batteries in charging, discharging and assembly before use Put the batteries in fire-proof container in charging Never leave batteries unattended when charging Do not put batteries on wood surface or carpet when charging We are not liable for damage if there is any modification of the batteries in form, shape or made into packs We are not liable for any damage caused by misuse or mishandling of theses secondary lithium batteries SpecificationsOutput Voltage: 3.7V Amperage: 2600mAh Chemistry: Li-Ion Height: 65mm Diameter: 18mm Terminal Type: Flat Top