A battery management system includes several blocks: a battery cell array comprising a plurality of battery cells; a charger selector array connected electrically to the battery cell array to charge the battery cells; an analyzer array configured to monitor a condition or status of the battery cells and report the condition or status of the battery cells; a battery output array connected electrically to the battery cell array to provide electric power out of the battery cells; and a controller configured to control charge movement and command flow among the blocks in the battery system such as charger selector array and the battery output array according to the reported condition or status from the analyzer array.