1. No indicator for 'charging'.
2. Its 'adapt brightness' does not work. Sometimes its screen goes dim to black until we can't see what is on the screen. It happens within about 5 seconds.
3. Its battery only suitable for internet text browsing. If you watch videos, battery gets only about 2 hours.
1. Get 2 units, while you use one, you charge the other.
2. Set brightness to at least minimum 40% so that it won't get dim/black very fast.