In anticipation of an eternal and ubiquitous source of energy, all (Bluetooth) communication systems still need to be charged.
This is invariably done by means of a cable, whether or not in combination with a charger, adapter or the right outlet. You put one end in the device to be charged, the other end in a wall socket or the like and ... that's where it goes wrong sometimes.
Cables, chargers ... are the objects that are most often left behind somewhere unintended. If you've lost your charger, or just want to have an extra one for your travels, you'll find all the answers here.