A charging system can include a removable power source housing. The removable power source housing can be devoid of being worn on a finger of a user. The removable power source housing can include a first LED activated in response to a first activity at the removable power source housing. The removable power source housing can include a second LED activated in response to a second activity at the removable power source housing. The second activity can be different from the first activity. The removable power source housing can include a third LED activated in response to a third activity at the removable power source housing. The third activity can be different from the first activity and the second activity. The charging system also can include a ring housing. The ring housing can be configured to be removably coupled to the removable power source housing. Other embodiments are disclosed.