There exist “USB wall chargers”, see Google: https://www.google.com/search?hl=en&q=usb+wall+charger&gws_rd=ssl
(I use one of the “universal” kind.)
There exist “USB wall chargers”, see Google: https://www.google.com/search?hl=en&q=usb+wall+charger&gws_rd=ssl
(I use one of the “universal” kind.)