Ofcourse you can't charge your battery. You can think it like this, let say you have a tank on your roof and now you want to fill this tank with a water. You have motor on your ground floor. So if your want to drive water up in the tank then you should need a powerful water motor.
Here, roof tank is analogous to mobile battery,
motor is a battery from which you want to charge the mobile.
Actually, when you charge the mobile then it has some potential in it stored which act as a counter source for that one from which you are charging your mobile. So first you need to overcome that voltage then the remaining voltages charge your battery.