to have more battery capacity, I would change rechargable battery with CR2477.
The 2477 is 3V battery (not 3.7 like rechargable).
Do you have any suggestion?
Better to install on the same rechargable battery GPIO or on other GPIO?
Thanks a lot,
Unfortunately, the MMC does not support rechargeable batteries OF ANY KIND. The voltage is not that same as a traditional coin cell (non-rechargeable) battery as you pointed out. This is why we made the MMRL and MMS model.