The charging process of Li-ion batteries is very similar to that of lead-acid systems: the Chargers are current and voltage limited. Particular attention should be paid to the end-off-charge-voltage. Under no circumstances it may exceeded the limit given by the manufacturer. An exceedance can cause excessive heat or even fire.
Complicating factor is that different types of Li-batteries with different end-of-charge-voltages are common in the market. The main types are: lithium cobalt oxide, lithium manganese oxide and lithium iron phosphate cells. They differ in energy density and current-carrying capacity as well!
Characteristics of Li-Cells <--back