What is the correct connector for the RTC? Raspberry Pi 5 uses the JST SH connector, but that’s 1mm spacing. Your documentation says 1.25mm spacing, but I cannot find the correct connector. The JST-GH series doesn’t fit. Any USA links where I can purchase a compatible coin cell battery with the correct connector?
Dear customer
We recommend that you purchase the connectors from the following links.
The following link contains the CR2032 battery, along with the wire and connector; however, we have not yet verified this combination on our end.
Thanks for the quick reply. This is the exact info I needed, and I’ll give these a try.
Dear customer,
If you have any further questions, please feel free to post them.
To followup. The Amazon JST 1.25mm micro female connector fit perfectly. The connector on the Amazon battery mentioned above is incorrect and doesn’t fit (it uses a mx 51146 connector and has a CR2032 battery). See image below.
Also, once the hwclock is programmed and the power removed I measured the Rubik Pi drawing about 10 uA from the coin cell. However, when power was attached the RTC circuit was actually trying to charge the battery (-2uA on my 3V CR2032). This is horrible for a CR2032 battery chemistry. Does the RTC circuit on the RubikPi try to charge the coin cell or is my measurement in error? If it does try to charge is there a way to turn off this feature, or are only rechargeable batteries supported? I couldn’t find this specified in any of the documentation.
Dear customer,
we are currently syncing this issue internally.
Dear customer
This is a known issue, and it will be addressed in an future software update. You can stay informed about further developments.