DIY:Transform any charger into Usb charger

What we did was transformation (and repair) of broken Car-cellphone-charger into usb-cellphone-charger.

Computer with usb ports are everywhere and transformation is very easy.

1.cut away usb cable male plug
2.cut away adapter (or open adapter and get the two power cables)
3. connect red and black cable of usb to charger cables.

Charging over usb is pretty slow.(but may be good for battery?)

usb can power even from electrical plug.