Prepping is kinda associated with people who prep for stupidly over the top unlikely SHTF scenarios were if the world as we know it has gone then yes maybe a lot of electronics will be useless, but not all, the longer you keep your mobile alive the longer you could have access to what is basically an e-reader which could house millions of survival books and associated materials like mechanics, first aid etc etc, I’d rather carry my tiny phone and a few batteries and a small solar charger than the weight of a stack of books, because in reality you’d need much more knowledge to survive than the significant majority of people possess in their heads, knowledge is power.
The term "survival kit" may also refer to the larger, portable survival kits prepared by survivalists, called "bug-out bags" (BOBs), "Personal Emergency Relocation Kits" (PERKs) or "get out of Dodge" (GOOD) kits, which are packed into backpacks, or even duffel bags. These kits are designed specifically to be more easily carried by the individual in case alternate forms of transportation are unavailable or impossible to use.
For personnel who are flying over large bodies of water, in additional to wearing a survival suit over cold water, a survival kit may have additional items such as a small self inflating raft to get the aircrewman out of cold or predator infested waters, flotation vests, sea anchor, fishing nets, fishing equipment, fluorescent sea marking dye, pyrotechnical signals, a survival radio and/or radio-beacon, formerly a distress marker light replaced by a flashing strobe, formerly a seawater still or chemical desalinator kit now replaced by a hand pumped reverse osmosis desalinator (MROD) for desalinating seawater, a raft repair kit, a paddle, a bailer and sponge, sunscreen, medical equipment, a whistle, a compass, and a sun shade hat.
Remember that this pack should be prepared and stored somewhere easily accessible and rodent proof. It is also a good idea to review the contents of your pack every 6 months to ensure you have appropriate clothes packed for the season and that your gear and rations are in order. This will help you feel confident that your Bug Out Bag is ready to go at a moment’s notice!
The condition belongs to the geologic age--the great birth and growth of the world, when natural forces ran riot, when the struggle for existence was so savage that no vitality which was not founded in a gigantic form could have even a possibility of survival. That such a time existed, we have evidences in geology, but there only; we can never expect proofs such as this age demands.