I have a s7 edge but it not charging, I plug the charger but appeared 0% all through.

SOURCE: Does leaving a cell phone charger plugged in to an outlet at home,without having the phone charging in it,drain energy from your home?

Yes. You are right. Here energy is not the criteria. It is always safe to unplug the charger (when not in use) to prevent the damage of a cell phone due to accidental over load of electricity or short circuits. Moreover Chargers do draw power when plugged in, whether or not a device is actually being charged.
If the charger is plugged in someplace easy to access, like right by where you keep your phone, you should unplug it. But if it would be difficult to have to plug it in every time you need to use it, you'll be fine just leaving it plugged in..and.It still uses energy even when not charging. Any electronic device plugged in a socket uses energy whether it is in use or not.

SOURCE: Targus ac70u adapter; 0% available, ( plugged in, not charging )

Is the Tagus adapter your original adapter?
Check the adapter wih a multimeter to see if the voltage output is or slightly greater than what is printed on the label.
The adapter may not have sufficient amps to charge the battery and run the laptop, check the current rating of the original adapter and compare it with the Targus, it should be the same voltage and current rating or higher current rating.
If the adapter is OK then the battery is worn out and needs to be replaced. Recharageable batteries have only a limited number of charge and discharge cycles, when this is reached they just don't work any more. Buy a new battery, not a 2nd hand one because of the reasons I've mentioned.

SOURCE: nokia 2300 charging problem

just adjust or change the pin in mob

SOURCE: cig lighter, radio, etc wont work after plugging in cell phone to charge

it sounds like you blow up a fuse,check your fuse box,
check your manuel for locations

gl G

SOURCE: The wires on my Sciphone i9+++ USB phone charger

yes you can but if your willing to pay for one here is a site you should look at here.