Cyber Security Engineer
There's literally no reason to do this. The laptop will stop charging the battery when it is full.
to prolong battery life I would like a tool, program, way to have my laptop stop charging, when the battery is at 80% (or more?!) of its capacity. To then wait for it to drop to 40% and only then start charging again. This obviously can only be a temporary tweak (e.g. when the laptop is plugged in overnight) as I would need the notebook to be (almost) fully charged at times.
According to my experience, this is not true. The CPU frequency cannot raise above base frequency (turbo boost) any more, if AC adaptor is unplugged, even if the power plan is switched to "high performance".The battery provides the same power until it is drained. To stretch the time it takes to drain out, Windows cust down on performance. This can be adjusted by selecting a different power plan if desired.
By the way, the goal was to stop charging the battery, therefore battery degradation can be reduced. "Keeping battery level around 50%" is not the goal itself.The battery provides the same power until it is drained. To stretch the time it takes to drain out, Windows cust down on performance. This can be adjusted by selecting a different power plan if desired.
que?So you're a salesman?
but Windows standard battery level meter still has a percentage indicator, so windows still knows how far the battery is charged? or do you mean that actually being in charge/no charge state is to do with specific (Fujitsu in this case) circuitryThe firmware and circuitry is usually proprietary to the vendor so Microsoft wouldn't be able to control that functionality. The software I mentioned from Dell only works on Dell devices.