A method is provided for charging a plurality of cells in a battery pack to a target charging value. The method includes: delivering a charging current to the plurality of cells; monitoring cell voltage of each cell in the plurality of cells to determine when at least one of the cells reaches the target charging value; and diverting the charging current around the cells having reached the target charging value and cooperatively adjusting the charging current so that a current received by the cells having reached the target charging value is substantially zero.