In today's generation, access to additional USB charging points is becoming a necessity due to the growing number of electronic devices that charge via USB.
How safe are double adapters?
It is common that homes lack general purpose outlets (GPOs) or powerpoints. Most have also been customise to grab a double adapter to provied additional power point to charge up the gadgets especially mobile phones and laptops. But it is important to know what are at risk and what problems might occur from doing so.
Always disconnect the power supply first. Only touch the victim after making sure the power supply is turned off. Remember to be very extra careful in wet areas, like bathrooms. Water conducts electricity. If you can turn the power supply from the whole building just to be absolutely sure, then do it.