The number of devices that a portable power station can charge depends on a variety of factors, including the maximum output power of the device, the capacity of the battery, and the type of ports and outlets that the device has.

The maximum output power of a portable power station is measured in watts (W) and refers to the amount of power that the device can provide at any given time. A portable power station with a higher maximum output power can handle more devices and devices that require more power. 

For example, a portable power station with a maximum output power of 200 watts can handle charging a phone, a tablet, and a small speaker at the same time, while a portable power station with a maximum output power of 1000 watts can handle charging a laptop, a refrigerator, and a portable air conditioner.

The capacity of the battery is measured in amp-hours (Ah) or milliampere-hours (mAh) and refers to the amount of energy that can be stored in the battery. A portable power station with a larger capacity battery will have more power and last longer when in use. However, it will also take longer to charge. For example, a portable power station with a capacity of 100 Ah can provide power to a device that requires 50 watts for 4 hours, while a portable power station with a capacity of 200 Ah can provide power to a device that requires 50 watts for 8 hours.

The type of ports and outlets that a portable power station has is also an important factor to consider. Some portable power stations have only USB ports, while others have AC outlets, DC outlets, or a combination of both. It is important to check the type of ports and outlets that your devices use and ensure that your portable power station has the appropriate ports to connect them. For example, a portable power station with only USB ports can handle charging a phone and a tablet, while a portable power station with AC and DC outlets can handle charging a laptop, a refrigerator, and a portable air conditioner.

To give a more specific answer, a portable power station with 100W max output and 100Ah capacity can handle charging a phone, a tablet, and a small speaker at the same time for about 10-12 hours, but it will depend on the usage of the devices.

In general, the more devices you want to charge and the more power they require, the more capacity and output power your portable power station should have. It’s always a good idea to check the specifications of your devices and compare them to the specifications of the portable power station before making a purchase.