I have bought a USB extension cable for one pound at the overflow shop in Mare Street.
This is 5 metres long and enables me to put my phone on charge on the nearest table, rather than on the floor next to the nearest power socket.
The USB lead you get with the phone is usually only 1 metre long, so everyone puts their phone on charge near the socket. This leads to people stepping on it and damaging the socket when it gets accidentally pulled out.
Putting the extension cable in the charger and the other end having a socket to take the charger cable (this works for Apple as well as other Android phones) gives you plenty of cable to put it safely on a table or out of the way.