https://www.youtube.com/watch?v=DyXRawBxhMw

Power, generally in the form of charged batteries, is not to be wasted. Previously, it was an infinite (but heavily regulated and ludicrously taxed) resource, but has recently fallen dangerously close to a finite and rapidly dwindling resource. Personal electronics are all powered by PGBs, or a Personal General Battery. These large units can store power and be recharged - mercifully possible through the generally universal interchangeable ports and wires. Common utilities are flashlights, radios, transmitters, headsets, cassette players (music helps pass the time, some have even begun collecting rarer releases), electronic organizers (packed full of interesting information, even crude and primitive maps formed in the screen's pixel presentation), life-support helmets, and image-enhancing goggles. Heated blankets, self-heating clothing, and others alike are often given as tokens of affection, or special gifts for little ones.

With 65% of the population dead, there are more than enough PGBs to go around. It's very common for any given individual to have at least a PGB and electronic organizer.

Scavenged and useless electronics are usually drained of their power, which is diverted to the user's own preferred use. PGBs have many ports, normally allowing their signature blood-red wires to connect to anything a person might need simultaneously - though of course to converse power, it's common practice to only be running energy to ports when needed. This is typically devoted to radios, which are one of the few electronics to be on nearly constantly.

Those with many wires, or more electronics than their PGB has ports for often takes on a bizarre appearance, the red wires weaving their way around their bodies, into pockets and through vests. Some prefer to bundle or tie them, as to not have them exposed, but others prefer the ability to easily access the different wires - which can be a daunting task when heavy gloves are worn and one's visor is mostly frosted over.