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If you've bought a relatively modern phone there is a good chance that it has wireless charging. This is a method of charging the phone without plugging the supplied power cord into the bottom of the device. The back of the phone is required to be rested or placed onto a wireless charging surface and that's it, no need to fumble for a cable, especially in the dark.
If you buy a phone today it may have wireless charging capabilities but the manufacturer is still only including the cabled option in the box. A wireless charger does require a separate cost. The likes of Samsung are now selling their own branded wireless chargers and Apple will be bringing one to the masses shortly also, but there are alternatives.