Adjusting electric energy of plurality of batteries mounted in traveling vehicle

A power-supply control device that is mounted in a vehicle including a plurality of electric storage devices and that controls charging/discharging with respect to the plurality of electric storage devices, the power-supply control device comprising:

• a distribution adjustment unit configured to:
• adjust electric energy in a manner that a difference between a remaining capacity of a first electric storage device and a remaining capacity of a second electric storage device becomes small when each of the electric storage devices is charged/discharged,
• distribute input/output electric power to the first electric storage device and the second electric storage device on a basis of a remaining capacity ratio between the remaining capacity of the first electric storage device and the remaining capacity of the second electric storage device when adjusting the electric energy;
• and
• a loss comparison unit configured to:
• compare a loss in power running with a loss in regeneration in a case where an amount for the adjustment of the electric energy becomes the same between in power running and in regeneration, and
• determine whether a loss in power running or a loss in regeneration is smaller in a current state,
• wherein the distribution adjustment unit is configured to adjust the electric energy by performing the distribution in accordance with the remaining capacity ratio in the current state in a case where it is determined that loss in power running is smaller when the current state is a power running state or in a case where it is determined that loss in regeneration is smaller when the current state is a regeneration state.