Hello Olimex team,
May I suggest that on future Olimexino-STM32 PCB release you add a possibility to separate VBat pin (1) of the STM32 from 3.3V? Using pads than can be cut in middle for example.
This would allow us to easily connect a 3V battery directly to it, which makes internal RTC running all the time at very low current consumption (less than 1.5uA).
I cut the track and connected a 3V lithium battery, it works very well, and an updated PCB would makes things easier.
Many thanks.
Manu