Photon and VBAT pin

Will the Photon have exposed VBAT pin?
I’ve seen the pin in the photo but wanted to confirm.
So, I’m wondering if we will be able to connect a coin cell to keep the RTC running during power outages.
Is there any pitfall on connecting the coin cell directly to VBAT or we need some sort of external circuitry to avoid VIN messing up with the coin cell.

@roberto_imai Yes, according to the information here