I’m looking to use a coin cell battery on my photon’s VBAT input. (It’s important for my application that the clock keep running when the device is unplugged or loses connection to the cloud.)
I’ve done some reading on BR vs CR batteries, but it’s still not clear to me which would be more appropriate for the photon’s RTC.
I’m not doing anything special: mostly stored and operated at room temperature and don’t expect it to sit on the shelf for more than a few months.
Any advice?