![Green Plug](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2duwiTY-T5U5uofJ7SXTi88cBZKx8W69tcKZmU7nb86Fkbo3-Us7RN_koJMA-7s3qWa6CEs9QI5taal0HnUGJxFcTwsrMe1JScg_VuXxAVTI7F15eNl0vrY4myJdlWvj2sMMWPq3roitg/s320/GreenPlug.jpg)
Green Plug have a good solution whereby devices can communicate with a standard, 'intelligent' power supply. The device sends data on the voltage it requires and lets the supply know when it is fully charged (so the charger can stop sending power). Every compliant device can use the standard charger.
Simpler, more efficient in use, less clutter in the cupboard, less unnecessary manufacturing. It's better in so many ways.