Battery charge and discharge only one channel, either charging, or discharge, there is no problem of charging while discharging, the conclusion is that the mobile phone charging while using nothing bad, if you are not afraid of trouble, has been dragging the charger to use, but also reduce the number of battery discharge, extend battery life. However, it is also risky to do so, because none of us can guarantee that the characteristics of the battery's charge and discharge protection circuit will never change and the quality of foolproof, so dragging the charger, your battery will be in danger for a long time, lithium batteries are very delicate, overcharge and overdischarge will cause great harm to lithium batteries. I have indeed heard the news report that the battery exploded while charging the mobile phone. My explanation for this is: because the mobile phone has been charged while playing, if the charging protection circuit does not work or fails, the battery will be charged for a long time due to too long playing time (overcharge) and thus explode.