batteries - What's the correct way to solder wires on that (LiPo) battery's terminals? - Electrical Engineering Stack Exchange
Samsung ICR18650-26 ZLF Non-standard battery (rechargeable) 18650 Z solder tab Li-ion 3.7 V 2550 mAh | Conrad.com
MP 3.7V US14500 680mAh Lithium ion Rechargeable Batteries ICR 14500 li ion batteries with solder sheet for electronic toy|Rechargeable Batteries| - AliExpress
Wave Solder an Alkaline Battery on a PCB (any concerns)? - Electrical Engineering Stack Exchange
Power Your Soldering Iron With a Drill Battery! : 4 Steps (with Pictures) - Instructables