Hang it on your rucksack while hiking for example. You can always be sure to have power for your mobile devices, regardless of how far you are from the nearest mains socket. Water- and shockproof materials.
Plus, check back each day until Christmas Eve for other awesome computer related gadgets.
The Solar 5-Panel Powerbank 27000 can be found behind day 9 of the Sandberg Advent Calendar 2024.