Wireless charging would be a great ease

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Many of us face great difficulty because of charging pins or the short size of charging cable. We know there are electromagnetic waves all around us like radio, wifi, bluetooth and solar radiations. So if there may be some sort of battery or cell phone with such low current or voltage will be able to charge with such waves. By such technology our appliances will get automatically charged because they will extract energy from environment. Well till now i guess we can only dream about it