2UUL Soldering Wire for Battery Metal Board Soldering 0.8mm*3m
Amazon.com : RCBDBSM 709AD Battery Spot Welder Battery Welding Soldering Machine for 18650 Lithium-ion Battery Pack Welding 0.3mm Nickel Strip with Cooling System and Soldering Iron 2 in 1 : Tools & Home Improvement
NIONSUPPLY 50pcs 4P H type T type Nickel Plated Steel Strips Sheet Soldering Tabs for DIY 18650 Lithium Battery Pack, Battery Connector Tab Battery Cell Spot Welding Welder (4P Square) - Amazon.com
Wireless Charging Welding Tool, Professional 510 Thread Interface USB Soldering Iron 5V 15W Battery Powered With Tip And Holder For DIY Silver - Walmart.com
TADIRAN SL760T: Lithium battery, AA, 2200 mAh, U solder tags, pack of one at reichelt elektronik