Lol this thread is a classic... "slowing down electricity" is a good one. I have an EE background as well, like Delta3MM. Your phone charger is either working or it isn't... there is no way to make it charge slower without hacking the thing apart. If the voltage in the socket is within range of the power supply to operate, then it will. Most likely a case of user error with it not plugged into the phone just right so it stopped charging, or the outlet was on a switch in the room that got turned off.