This is how portable the "rock splitting kit" / "boulder splitting kit" is...
Using it, it needs no external supplies - power, water, etc. This is portability in more than one sense.
This is what is in the rock-splitting kit:
Closing explanation - this kit is for using down a mine to break-up
boulders needing to be broken-up to remove them.
Hence the kit must be portable in constricted spaces (it is), is
extremely advantageous if it needs no external power or other supplies
(this kit yes), must not raise fine silica dust (reason for water in
bottle with fine hole in lid plus spare watertight lids), and must be
inexpensive and robust given harshness of mine conditions.
(R. Smith, 26Apr2024)