VDC would be the abbreviation for Volt Direct Current which translated would volts direct current. The idea of ??this type is unidirectional current to the load. Direct current is normally produced by batteries, thermocouples, solar cells and a dynamo electric machine type. The direct current can flow in conductors such as wires, but may also flow through semiconductors, insulators ... In the image: 1 - current per pulse 2 - Direct Current (DC) 3 - Alternating Current (AC) 4 - Variable Current

Induction charging is a process by which a device can be a charger without direct contact.

Electrification or charging by induction is carried out when a body with an electric charge approaches another with a neutral charge, which causes a redistribution of charges due to the repulsion between them or when the neutral charge is rearranged upon receiving a nearby body with electric charge.

This reorderingor redistribution causes some areas to be loaded positively or negatively, by loading the device.

We can mostly find this charging system in mobile phones or smart watches which can be charged without connecting them with cable, it is only necessary to leave them in the induction base and the charging procedure will be performed automatically.

It must be said that not all devicesthey are of this technology, but it is possible in many cases to adapt them.