Thread: Forma Just rebooted on its own ?? without touching it for a day
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Old 03-19-2021, 01:21 AM   #18
davidfor
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Quote:
Originally Posted by NiMa View Post
Of course. Lithium batteries, when they go near 100% charge, are charged by trickle charging; only small bits of energy are given to the battery sporadically: to keep it near 100% but to also prevent it from burning.
Trickle charging is a great thing in life; but when you use it too much, it can damage the lithium cells and thus shorten the life of the battery.

This is a good read about that.
You might want to check your definition of "trickle charging". Trickle charging is exactly what the words imply. A trickle of electricity is sent constantly. It doesn't turn off, it is applied all the time. For some battery chemistries this is good. For Li-Ion it is a very bad idea.

Li-Ion is charged to a point and the charger turned off. When the voltage drops to a certain point, either by use or self-discharge, the charging turns on again to top up the charge level. In the past, my laptops would drop to a 95% charge before recharging. Current laptops seem to stick closer to 100%. Or maybe the self-discharge is so low I never notice it between times I use the laptop on battery.

But, overall, there should be no issues with leaving any device with a Li-Ion battery in it on charge. Assuming the charging and protection circuits are properly designed. Keeping the battery full isn't the best, but, it is a tradeoff between runtime and overall life. An issue could be temperature. It is likely that a plugged in device is running hotter than the same device on battery (less likely to go to sleep or use any power saving modes). Li-Ion batteries age faster with higher temperatures. But, I would not really expect this to be an issue for ereader.
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