Is this from the battery being on the charger constantly? I remember having a similar problem years ago. I thought most devices now would manage charging by letting it drain a bit automatically. At the time though they didn't so I for my continually connected devices I just used simple plug timers that cut it off for a few hours a couple times a day.
[Advanced Charging Controller (ACC)](https://github.com/VR-25/acc)
[BU-808: How to Prolong Lithium-based Batteries](https://batteryuniversity.com/article/bu-808-how-to-prolong-...)
However, doing that you do have the benefit of having "UPS" protection of course (how much depends on the charge cycle). In my case this isn't really a problem because if my power is down there is not much in my home left to control that still works.
Mobiles and tablets generally don't do this because they are almost always used in a mobile manner. With the exception of the special battery protection in iOS that was mentioned in the article.
What I do now is open up old tablets, remove the battery and replace it with a DC-DC converter. Because tablets and phones won't turn on without seeing a battery, you can't power them though USB with the battery removed.
But the DC-DC option works ok. Sometimes you need to remove the battery protection circuitry from the battery because the tablet needs to see it. This can be a bit hazardous. But usually providing about 4 volts is enough.
Of course all this is not for those without electronics knowledge.
Ps I also detest Google's removal of the shortcut buttons under the power button menu :(