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Amazon.com: LeFix CMOS RTC BIOS Battery Replacement Compatible with HP 820 G1 640 G1 CR2032 with Connector 2 Pins 2 Wires 1.0mm Pitch : Electronics
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Amazon.com: Rome Tech CMOS BIOS Battery for HP Compaq Presario CQ40 / HP Compaq Presario CQ43 / HP Compaq Presario CQ56 / HP Compaq Presario CQ62 - Laptop Backup 3V RTC CR2032
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