• Metered Electricity

  For people that use metered electricity, leaving your Android charger connected to an electric socket wastes some watts. Although, these are not very noticeable but it happens. As long as you charger is plugged in, the electric current activates those working electrical components in your charger.

  In some chargers, there are led indicators that show when the charger is correctly plugged in. So, in other to maintain both the led and some components in your charger, insignificant amount of energy is used.

• Electrical madness

  Electricity can be quite a bitch. You cannot really know good the connections can be. I used to experience some weird electrical magic in my apartment. I always feel electrical shock whenever i feel my chargers. Sometimes, the bulb sparks even when the switch is turned off.

  We may not know what may happen to a charger whose main purpose of design is to have something connected to it.

• Reduces charger’s life span
  This is most common of it all. Just like i explained earlier that our chargers draws some unnoticeable amount of energy when not connected to a phone. With this, it may reduce its life.

  Have you ever thought whenever your charging completes, it pops up something like “Charging completed/battery full, please unplug charger from  socket”? It is a very good indication that leaving charger plugged when not in use is a bad practice. It is an official caution from phone manufacturers.

In summary, if you are really concerned with safer living with electricity, the cost of purchasing another quality charger and some manageability in electrical bill which is somewhat not obvious, then it is not good to leave your charger plugged and unused.