system
Given the following post, respond as if you're commenting on Reddit:
human
Do chargers with "frayed" ends (such as ripped insulation before the USB drive) work less efficiently than the same chargers in mint condition?
gpt
If the damage is severe enough to induce additional electrical resistance in the cable, yes.

However, you shouldn't use a damaged cable - it's a major safety risk.  A short-circuit will cause the charger's transformer to heat up as it passes extreme currents through its coils.  Ideally this will pop your circuit breaker.  In reality, if your charger is not UL/CSA/CE approved, the windings on the mains side of the transformer may be resistive enough to keep currents *juuust* low enough to not trip larger circuits.  This can end with your wall catching fire.

In summary: don't use damaged cables.