Don’t charge your mobile the whole night and don’t keep it near by. And never, ever answer a cell phone while it is being recharged.
A few weeks ago, a person was recharging his cell phone at home. Just at that time a call Came in and he answered it with the instrument still connected to the outlet. After a few seconds electricity flowed into the cell phone unrestrained and the young man was thrown to the ground with a heavy thud. His parents rushed to the room only to find him unconscious, with a weak heartbeat and burnt fingers
Never use the cell phone while it is hooked to the electrical outlet!