There is a reason. The Battery Degradation is rapidly increased with a high state of charge. I am regularly repairing big Li-Ion battery packs most time the degradation of the Batteys comes from very high or very low state of charge. Not the cycle time. The State of charge of my laptop batter...
Hey there, I am currently using my laptop also as a desktop and would like to just keep the charge at around 50%. I have a charging power supply with a voltage regulator. so if I solder on the charging plug for my laptop and plug it in would it only charge up to the voltage of my power supply...