The International Space Station (ISS) has a power requirement of around 100-120 kilowatts (kW) when fully operational. A typical cell phone battery has a capacity of around 5-10 watt-hours (Wh). This means that it would take approximately 10,000-20,000 cell phone batteries to power the ISS for one hour.

However, it is important to note that the ISS does not rely on cell phone batteries for its power supply. Instead, it uses solar panels to generate electricity. The solar panels on the ISS convert sunlight into electricity, which is then stored in batteries for use during periods of darkness or when the solar panels are not facing the sun.

The ISS also has a backup power system that uses batteries to provide power in the event of a power outage. This backup power system is typically used to power critical systems, such as life support and communication systems.