Fully charging the battery can cause it to age more quickly and lose capacity. Limiting charge level helps to protect it, especially when it's always connected to a power supply and don't need the battery that much.
if the li-ion is kept < 4.25v that should be no issue. I don't know why overcharging is even considered a thing (100% should be 4.22v or so for a standard li-ion cells). You can keep all tool batteries at around 4.2v (fully charged), and nothing happens - they don't degrade.
What actually kill batteries is overcharging (which has to be done on purpose in the electronics) and heat, having internals over 60C is where the real issue is.
I think phones are the 1st ones that started overcharging just to ensure lower life expectancy of the device... and of course much better autonomy during the 1st impressions.
What actually kill batteries is overcharging (which has to be done on purpose in the electronics) and heat, having internals over 60C is where the real issue is.
I think phones are the 1st ones that started overcharging just to ensure lower life expectancy of the device... and of course much better autonomy during the 1st impressions.