CR2032 Lithium Coin Cell Battery : ID 654 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Comparing Three Coin Cell Batteries: CR2032 vs. LIR2032 vs. BR2032
China Sunmol Cr2032 Battery, Long-Lasting & High Capacity Cr2032 Lithium Batteries, 3 Volt Coin & Button Cell (5-Pack) - China Cr2032 Battery and Cr2032 price