We use Nano PI R1. We have problem with RTC battery drain.
We use conventional CR2032 battery.
The current drain is 200 mikro Amper when the device is off and not connected to power source, which is much more
than expected to keep Real Time Clock working.
What's more, the device is very sensitive to battery voltage. Once it is below 3.00 V the current time in RTC is lost.
This is a problem since typical voltage for this battery is 2.9V, after some discharge.
The CR2032 battery is not rechargeable, and we afraid that after some short power outage ( several minutes ?) it will stop working forever.

Friends ! Do you have any experiences ? Maybe use rechargeable battery LR2032 ?. Maybe any configuration settings to change current drain ? Maybe any configurational changes ?

Jacek from Poland