Unable to turn on

Sometimes the mobile phone can’t be turned on when it is placed for a long time, because the battery capacity is used up. You need recharge 10 minutes to confirm that if you can turn it on or not. Sometimes you should try to press the power button for 10 seconds to force to turn it off, and you can turn on it after recharging. Sometimes you can turn on the mobile phone when you recharge and the battery voltage is reached to starting voltage after it was placed for a long time.