This paper presents a different way to manage batteries composed by association of basic and redundancy cells. This is an algorithm adapting the internal configuration according to the state of charge of each cell in order to reduce cycling aging effects that cells undergo during normal operation. The lithium-ion pack reliability is summarized in this article before a presentation of simulation results. It is demonstrated that with the introduced cell management scheme, the useful remaining lifespan of the battery can be increased. As a result, adding redundant cells to increase lifespan becomes economically viable.