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Auto-grips will make the installation process easier and shorter for you. At the same time it will secure the cords.
This will let you know the maximum amount of voltage that the electrical adapter is able to handle. So when you are traveling and the hotels’ maximum voltage is lower than the number listed on the electrical adapter, then the adapter will not work. The voltage rating of a hotel can normally be found in a travel guide.
If you forget to check the voltage labels before you leave and still need to charge your devices then you are going to need a voltage converter or transformer.
Grounded plugs have 3 prongs and ungrounded plugs have 2 prongs.
An AC adapter, AC/DC adapter, or AC/DC converter is a type of external power supply, often enclosed in a case like an AC plug. AC adapters are used with electrical devices that require power but do not contain internal components to derive the required voltage and power from the main source of power. Adapters merely continue the circuit for the device to operate.
An electrical adapter is a device that converts attributes of one electrical device or system to those of an otherwise incompatible device or system. Some adapters modify power or signal attributes, while others merely adapt the physical form of one electrical connector to another. Plug adapters or travel adapters allow for dual voltage appliance or a transformer from one country to be used directly into a wall or outlet for another country. They do not convert any electricity at all.
If you see 110/240 posted on your device, that means it is dual voltage and that is required is a plug adapter. Most handheld and household devices (cell phones, cameras, etc.) have dual voltage chargers so a plug adapter is all you would need.
Plug adapters or travel adapters allow for dual voltage appliance or a transformer from one country to be used directly into a wall or outlet for another country. They do not convert any electricity at all. Converters however, are only requited when there is a change in voltage. This is called stepping up or down the voltage. For most hand held devices only a Plug Adapter is required.