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Single CR2032 Battery Holder with Three Flashing Modes : ID 4891 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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Wire Light LED Strand - 10 Red LEDs + Coin Cell Holder : ID 897 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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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
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Amazon.com: Taysing LED Light Emitting Diode Round with Battery Holder Coin Cell Holder Assorted Color White/Red/Yellow/Green/Blue Kit Box (φ3mm 1000pcs) : Industrial & Scientific
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