A Battery Care Function - Charging Level
Some notebooks have now the battery care function. This function saves the battery life and increases the life-span by not charging the battery to the full.
In a normal notebook use, if you stay on AC-power for long time, you may save the battery by low level charging. If you stay outside a lot, you may decide to change the charge to full 100% again.
The same idea may be used for the lithium battery applications as well. The same logic is applied for LiFePO4: the lower the charge/discharge cycle, the longer the life-span.