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CR1220 12mm Diameter - 3V Lithium Coin Cell Battery [CR1220] : ID 380 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: PKCELL CR1220 3V Lithium Coin Cell Watch Batteries for Thermometer 20-Pack : Health & Household
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Amazon.com: PKCELL CR1220 3V Lithium Coin Cell Watch Batteries for Thermometer 20-Pack : Health & Household
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