My Switch is taking too long to charge?

My Switch dies A LOT because I'm so stubborn to charge it as I'm playing it before I sleep. Now when it dies, I plug it in the night before, but even to morning it's stILL on it's charging screen pre-power on. At most, it would take two days untill the black screen with the battery-charge icon on... show more My Switch dies A LOT because I'm so stubborn to charge it as I'm playing it before I sleep. Now when it dies, I plug it in the night before, but even to morning it's stILL on it's charging screen pre-power on. At most, it would take two days untill the black screen with the battery-charge icon on the upper left dissapears, finally starting up and showing the home screen. Is there not enough power going into the system? When ON and charging while playing games on it, it still charges normally. I have an original Switch from a month after it's launch. It's not a big problem for me but it's a bit annoying. What's going on?
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