I used the DJI Fly app battery menu to find out the temperature. I did full throttle sport mode for 25 minutes for the battery to reach that temperature.Wow, that's interesting. In the desert during summer it reach at 50 C at the begging and reach sometimes to 70 in the midday.
I remember I flew the drone on a very hot day, 46C and yes no message or alarm however my phone gave me the temp high sign and I was panacking ?
Immediately on the car AC after 2 min, the drone was between the cables hovering and luckily not losing an investment.
Where did you reach 68C and apologize to ask, which program you used to find out?