The described technology includes a power distribution controller configured to control functioning of a first power source configured to supply power to a first component and to a second component and a second power source configured to supply power to the second component. The power distribution controller sets an upper limit of current from the first power source to the second component based on average level of charge at the second power source over a predetermined amount of time. The power distribution controller reduces the amount of power loss due to spikes in current from the first power source to the second component.