Soldering: Hakko FM-203 and FM-2027 handpieces
Hakko tips
Digikey Adafruit Seeedstudio
Specific Parts:
Coin cell battery holder - BAT-HLD-001-THM - https://www.digikey.com/product-detail/en/linx-technologies-inc/BAT-HLD-001-THM/BAT-HLD-001-THM-ND/3044009