Does a mobile phone charger use power when the mobile phone not on it?
It depends for exaple some chargers have a light on it, that takes energy not much but it does other then that no.
Why does a cell phone charger continue to consume power when plugged into an outlet but not the phone?
Most electronics will consume a little power even if they are off or not in use. In the case of a cell phone charger, you may notice that if it is plugged into the wall, but there is no cell phone charging, the charger will still be warm. I don't know the physics behind that, but anything that is plugged in will take up a little energy, even when not in use.
Can I use any cell phone charger for my i phone or do I have to use specifically the i phone charger?
mobile phone can use for everthing . However ,mobile phone have disadvantanges. By using a mobile phone . we use the mobile phone to communicate or browsing the internet .the disadvantages by using a mobile phone is we always waste the time with the mobile phone to play a game or when the mobile phone have internet , we do not do anythings just sit and play .
The most necessary accessories for a mobile phone would first be a wall charger in order to keep the phone operating and keeping the battery alive. The second important accessory would be a screen protector and a case for the phone to be inside of when it is not in use. This way if the phone were to be dropped, the case would be protecting the screen and will not crack as easily.