# | Component | Description |
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4 | USB ports | Plug USB devices, such as mobile phones or MP3 |
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| players, into these ports. The power supply charges |
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| the connected device’s battery. |
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5 | Ventilation opening | Helps cool the power supply. Do not block or insert |
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| objects into this opening. |
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6 | 110 V AC power connector | Plug an electrical device into this connector. |
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Using the power source
Most electrical tools, appliances, and AV devices have labels that indicate the power consumption in amps or watts. Make sure that the power consumption of the device you want to operate does not exceed the rated power of the power supply.
If you are not sure what the device’s power consumption is, you can safely try to operate the device from the power source. The
If the overload protection shuts down the power source, you need to unplug the device before the power source will restart.
Resistive loads are the easiest for the power source to run. However, larger resistive loads, such as electronic stoves or heaters, usually require more wattage than the power supply can deliver on a continuous basis. Inductive loads, such as some televisions, may require two to six times their wattage rating to start up. The most demanding in this category are those that start under load, such as compressors and pumps.
Testing is the only definitive way to determine whether the power supply can start a device and how long the device will run.