However, it should be understood that the concept of a float voltage does not apply equally to all battery chemistries. For instance, lithium ion cells have to be float charged with extra care because if they are float charged at just a little over optimum voltage, which is generally the full output voltage of the lithium cell, the chemical system within the cell will be damaged to some extent. Some lithium ion variants are less tolerant than others, but generally overheating, which shortens cell life is likely, and fire and explosion possible other outcomes. It is important to make certain that the battery cell involved can be safely float charged, and that in the absence of protection from a battery management system, that the charger circuit goes into float charge status when full charge is achieved.
