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DonHall 27/10/2017
These are a great teaching aid clock, BUT - There is an inherent flaw in the programming / RTC or both. For months that have "double digits", the flaw shows up. If the power goes out for any length of time, when restored, the first digit (if it was supposed to be a 1) will revert back to "0". You will need to go through the setup procedure again to tell it month 10, 11, or 12. I had this problem with about (4) of them, so either there is a bad run of chips, or there is a bug in the programming. Either way, beware of the error.
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  • Banggood Dear customer, Thank you for your order and before even attempting to explain the reasons leading to this unintended mistake, we would like to sincerely apologize to you. In our attempt to serve you better and retain you as one of our valuable customers, please contact our customer service representatives by this link: http://www.banggood.com/Contact-Us_hi111 We would highly appreciate if you could send us all the information listed here below: 1.Some photos of the shipping label, which can be found on the external side of the package; 2.The SKU number of the products you received. You can find this information on the label placed on the item itself; 3.Some photos or video to show the entity of the problem; 4.The order number and the product ID. Looking for your kindly reply. Have a nice day. Best regards, Banggood team  

    24/05/2024
  • KevinHeron i tried it,but didn't met the problem you mentioned.maybe you could check the CR1220 or the power supply wether if 5V.

    Reply 02/12/2017
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