Likewise, the MPPT varies the ratio between the voltage and current delivered to the battery, in order to deliver maximum power. If there is excess voltage available from the PV, then it converts that to additional current to the battery. Furthermore, it is like an automatic transmission.
On the Supreme Court of the United States, Associate Justices Potter Stewart and Anthony Kennedy have been described as swing votes between the two factions of the court. In the United Kingdom, the  Essex man ,  Worcester woman  and  Holby City woman  are examples of personifications of swing voters.
Many people wanted to know whether two-time cancer survivor Ruth Bader Ginsburg, the oldest and perhaps the most liberal justice on the Supreme Court, had enough gas in the tank to outlast the Trump presidency, or whether Trump would get a chance to fundamentally alter the balance of the court by replacing her, a possibility he dangled successfully to entice wary Republicans to vote him.