"To charge a smartphone" means to connect it to a power source, like a charger or a computer, so that the smartphone's battery gets recharged and it can be used again. Full definition
The on - board experience is further enhanced by the latest modern connectivity, including USB ports at each seat for charging smartphones and other devices. (breakingtravelnews.com)
Hopefully, we'll soon be able to have these super fast charging smartphones in the market. (nashvillechatterclass.com)
This is just a flat pad for wirelessly charging your smartphone. (androidheadlines.com)