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Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in vehicles, power tools, electric toothbrushes, and medical devices.
The bottom side of an LG WCP-300 Qi charging pad Opened Nokia DT-900 Qi charger. The WPC published the Qi low-power specification in August 2009. [8] The Qi specification can be downloaded freely after registration. [9] Under the Qi specification, "low power" inductive transfers deliver power below 5 W using inductive coupling between two ...
Retail store purchase using a swipe card where the balance is credited automatically to the phone after the retailer accepts payment. Retail store or online purchase: a person can top-up a prepaid phone in another country by asking for "international top-up". Often, migrant workers will send prepaid top-up internationally as a form of support.
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The E7's battery is not user-removable, [13] [14] although unofficial online tutorials on how to replace the battery exist. [15] Being one of Nokia's first phone designs without a dedicated connector for charging, the USB connector in the E7 is also used for charging, and is a common point of failure.
There are a variety of ways used to charge cell phones, including USB, portable batteries, mains power (using an AC adapter), cigarette lighters (using an adapter), or a dynamo. In 2009, the first wireless charger was released for consumer use. [9] Some manufacturers have been experimenting with alternative power sources, including solar cells ...