Amazon.com: Mini Skater 2 x 3V CR2032 Spring Clip Black Plastic Button Cell Coin Battery Holder Case with 6 Inch Wire Lead ON-Off Switch.(Black,4 Pcs) : Electronics
2 x CR2032 Coin Cell Battery Box w/ On-Off Switch & Plain Wires : ID 4988 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: SDTC Tech CR2032 Coin Button Cell Holder, 6V 2xCR2032 Battery Case with ON/Off Switch, Cover and Lead Wire - 5 Pack : Electronics
HALJIA 20PCS 3V 1 x CR2032 Battery Holder Coin Cell Button Battery Hol