BQ24105-Q1: cell balance

Hi Hayashi-san,

That is a system/application level decision.  Cell balancing keeps all of the series batteries at a higher capacity for a longer lifetime (i.e. more recharge cycles).  If the system doesn't require the batteries to be frequently discharged and recharged (e.g. battery backup) and/or cost to replace the expired batteries is low then cell balancing is likely not needed. 

Regards,

Jeff