These eye-in-the-sky cell towers hoverbetween 70, 000 and 100, 000-feet and provide coverage for a 200-mile radius on Earth- but the darn things only stay aloft for 24 to 48 hours before freefalling to the ground (or tree, or lake, or Grand Canyon).
Those chemicals, which hover at cold-miser temperatures between minus 180 and minus 230 degrees Celsius, let the chip go into overdrive mode without overheating and breaking.