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up^2 and rechargable rtc battery?

Hello,

I've been playing with up^2 board for some time and lately found an issue with rtc clock - my cr2032 battery has been discharged, and I had to replace it (wrong date/time caused issues with i2c and my oled display was having issues because of that).
RTC is now working, however I've got to thinking - can I replace the normal 2032 battery with some kind of rechargable battery/accumulator which could be charged during device is powered on?
Any ideas, examples?

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