Is normal that the red light stays on solid when your phone is charging, until it gets to 100% of charge, then will turn green and will stay solid green until you unplug the phone. If you have less than 15% of charge (and the phone is unplugged/not charging) the red light will blink. Check if you have any app that can cause that problem, same thing happened to me and I found out that it was because of an app (notification app in my case).
What does the solid blue light mean?
These colors are for standard notifications and functions of your device.
- Pulsing: the device is turning on or off.
- Blinking: there is an unread notification (missed call, message etc) or during voice recording.
- Glowing: connected to a charger and charging.
- Blinking: connected to a charger but not charging, or when low on battery.
-Glowing: connected to a charger and fully charged.
-Blinking: fully charged.
When do you notice this always on? Then the device is being used, sitting to the side, trying to be turned on? It could be an app using the Blue LED which is why I ask.
Ah fair enough! While I'm sorry to hear about the battery, at least you know what was wrong now.