RTC Backup Battery dies after 2 hours. Tested twice!

[chuckbook]

In fact the pyblite has it's merits when low power operation is key. You can run the board from VBAT with a small battery and
put the device into deepsleep when V+ drops below a certain voltage. Such a configuration will keep the RTC active.
Of course the LSI based clock is not very precise. I heard that the PYBLITE is also available with an RTC crystal installed.

[Trönfstar]

Deepsleep is a good option.

[pythoncoder]

I'm puzzled by this discussion. The Pyboard Lite schematic shows a 32KHz crystal (component ref Y2).

[Trönfstar]

I'm puzzled by this discussion. The Pyboard Lite schematic shows a 32KHz crystal (component ref Y2).

Yes, it is the LSI mentioned by Chuckbook. I downloaded the MCU's datasheet to study RTC.

[chuckbook]

RTC crystal isn't populated on PYBLITEV10. Initially this seemed to be a strange idea. But this feature allowed us to use a precise TCXO that fits on the unpopulated footprint of the RTC crystal.