The first one is based on the location of the home plug at home, some plugs are far away from the short charging line on the sofa is unable to play while charging (Safety recommendations try not to play while charging, which is a large load on the phone)
The second is to use the charging bank, if you are willing to play while charging, the charging bank 1 meter line is enough. Charging treasure are around, charging what is more convenient.
The third comparison recommendation is to buy a two-meter cord. one