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I noted that the details say "LIR2032 battery not included". However mine was shipped with a CR2032, so thank you for that. The board is designed for the rechargeable LIR2032. So if you use a non-rechargeable CR2032 it would be best to remove the charging components i.e. remove either of diode D1 or resistor R5 and also remove resistor R4, then you need to short out resistor R6. That way you will get the full capacity of the battery, and avoid charging it. It would be very helpful if you could add the circuit schematic. That would have avoided me having to trace out the circuit. U1 appears to be for an optional 1-wire temperature sensor such as the Maxim DS18B20.
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Product worked initially but failed to retain data in battery backup mode. I fixed the problem with a diode in series with the 5v input pin. This should have been on the board at manufacture or mentioned in an included sheet.
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As described
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Good RTC keeps time very well good quality products
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The module itself works fine and just as expected for reading the time however I've integrated it into a clock project and have found that it gains about 10 seconds each day which is not ideal for a clock
Verified purchase: Yes | Condition: New