Im a tech based out of Miami and 90% of my work is on location in the heat. Often throughout the day I'll have my fans set to full blast (or at least I did before I got my M1 Max) to keep my machine running cool. Obviously this would kill my internal battery but Im always plugged into a Zendure SuperTank. I have 4 of these and usually that will last me a day unless Im doing some extra heavy lifting or its exceptionally hot out. Ive never used the Pro version and these are a bit cheaper. I have 2 of these chargers going at all times in the moho or where ever I can find power. A comon complant I hear is they arent mountable to the digiplate. Personaly I just stick them in my robocup or my tripod apron. Never had any issues, highly recommend these if you're looking for external power on location.