The most complex attribute is having multiple protection mechanisms to ensure safe charging. Quality chargers include protection against short circuits, open circuits, overvoltage, and overloading. These layers protect the device being charged and prevent damage caused by charging issues. Examples from this selection include adapters and cables that support protection against electromagnetic interference, along with added safety measures and quality standards, and sometimes warranty cards. Choose a charger that clearly states it includes electromagnetic protection and automatic stop if a problem is detected.