No, I'm sorry if my tone sounded like I was offended, but I was actually quite impressed by those environmental conditions, as they are very different from the ones I live in (here in a hot summer you hit 32ºC rarely).
The thing is, you live in a very harsh environment for battery powered devices. Almost any demanding battery powered device is nowadays powered by a Li-Po battery:
en.wikipedia.org
As these allow for higher charge and discharge rates than other types of batteries. My smartphone is powered by those, and so is my notebook. Lithium batteries don't like extreme temperatures (usually outside of the 0-45ºC range) and devices powered by them suffer when working on environments with temperatures over 30ºC:
en.wikipedia.org
Charging or discharging a battery produces heat (the higher the rate, the higher the heat), and unfortunately Li-Po cells are dangerous (may explode or catch fire) when exposed to certain conditions (over-discharge, that is, discharging them under their nominal value; overheat, that is, heating them over their max. temp.; puncturing the cell and so on...) to avoid this, consumer grade Li-Po batteries have a small circuit designed to avoid over-discharging the cells (if voltage of a cell drops close to nominal value, the battery outputs 0 volts), avoid overheating the cells (it will not charge over a certain temperature) and some other safety measures.
My point of view is: the Pyra, being a passive cooled (no fan) Li-Po powered device would have a hard time functioning or charging under those conditions, as it would also happen with any modern smartphone I'm afraid (same conditions apply: passive cooled, lithium battery powered)