4pcs Panasonic NCR18650B 3.6 Volt 18650 Battery 3400 mAh
if you want to weldering tabsyou can buy Spot Welder  on yokodai.jp HSW-03Applications* Building portable power device that needs high energy density and low weight.Product Specifications SpecificationItem Content CapacityNominal Capacity: 3350 mAhTypical Capacity: 3250 mAhMinimum Capacity: 3250 mAhNominal Voltage 3.6 VInternal Impednce 32mohmDischarge Cut-off Voltage 3.0 VMax Charge Voltage 4.200.05 VStandard Charge Current 0.52 ARapid Charge Current 1.3 AStandard Discharge Current 1.5 A or moreRapid Discharge Current 1.9 A or moreMax Pulse discharge Current less than 6 AWeight 47g(1.67 oz)Dimensions Diameter: 18 mm(0.7 inch) Height: 65 mm(2.559 inch)Operating Temperature Charge: 0~45 oC Discharge: -20~60 oCStorage Temperature During 1 month: -5~35 oC During 6 month: 0~35 oCWARNING* Caution: when working with Li-ion cells, they are very sensitive to charging characteristics and may explode if mishandled*Protective Circuit Board is required when making packs * User should have enough knowledge on Li-Ion rechargeable batteries in charging, discharging, and assembly before use* Put the batteries in fire-proof container* Never leave batteries unattended when charging* Do not put batteries on wood surface or carpet when charging* We are not responsible for damage if there is any modification of the batteries in form, shape,or made into packs* We are not responsible for any damage caused by misuse or mishandling of theses Li-Ion batteries