EU rules requiring all new smartphones, tablets and cameras to use the same charger came into force on Saturday, in a change Brussels said will cut costs and waste.Manufacturers are now obliged to fit devices sold in the 27-nation bloc with a USB-C, the port chosen by the European Union as the common standard for charging electronic tools."Starting today, all new mobile phones, tablets, digital cameras, headphones, speakers, keyboards and many other electronics sold in the EU will have to be equ...