<http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html> “Why are my laptop batteries always dying in a year or two, while the batteries of space probes and satellites keep working year after year. If we are to believe Battery University, the cause is me charging the battery whenever I have a chance, and the fix is to not charge the Lithium-ion batteries to 100% all the time, but to stay below 90% of full charge most of the time.” ... “Is there a good and generic way with Linux to tell the battery to stop charging at 80%, unless requested to charge to 100% once in preparation for a longer trip?”