You might wonder why your charger doesn't have an off switch. Turning a charger off completely so that is uses zero watts - can be only done using a hard switch. For safety reasons, we would have to put this switch on the charger block itself (the bit that plugs into the wall) not on the cable. It would be just as easy to unplug the charger as it would be to use this switch.

If, instead of a hard switch, we were to use an electrical switch there would always be some component connected to mains and could still be using around 20mW.

We're working on finding a long term, sustainable solution and are testing and developing new technologies all the time.

Until then, we'll keep making our chargers as efficient as possible, reducing the energy they consume, and encouraging people to unplug them when their phones are fully charged.