The actual best-practice for batteries is 50% when unused, and the 20% to 80% range when used.
They already don't provide 50% at all, even though my laptop has been kept connected to mains for 1 year straight. All I get is a range of 76% to 80% or so, with a battery life that keeps diminishing for no reason.
But, in reality, they don't even provide the 20% to 80% range, either, because it still charges to 100% on each disconnect, however brief it may be.
I've had multiple batteries completely fail within just a few years after being topped up to 100% all the time.
I also have a ThinkPad with a 15-year-old battery that's still working just fine (1 hour runtime is not that bad for such an old battery), because it's been kept at the 50% most of the time when I don't need to use it on the go. If it was kept at 100%, I'm pretty sure it wouldn't last 2 minutes now.
They already don't provide 50% at all, even though my laptop has been kept connected to mains for 1 year straight. All I get is a range of 76% to 80% or so, with a battery life that keeps diminishing for no reason.
But, in reality, they don't even provide the 20% to 80% range, either, because it still charges to 100% on each disconnect, however brief it may be.
I've had multiple batteries completely fail within just a few years after being topped up to 100% all the time.
I also have a ThinkPad with a 15-year-old battery that's still working just fine (1 hour runtime is not that bad for such an old battery), because it's been kept at the 50% most of the time when I don't need to use it on the go. If it was kept at 100%, I'm pretty sure it wouldn't last 2 minutes now.