so i let my battery drop to 0% and than went to charge it, but it was not charging at all. so after researching on the internet. i saw a few ways to make it work again. tried it at night and nothing worked so i gave up but i left it plug in the charger. in the morning i tried again by plugging the charger into another socket and held the power button for 30-45 sec and viola the notification light of hope started blinking!