A USB power strip is a multi-outlet device that combines traditional AC outlets with USB ports, offering a convenient and versatile solution for charging multiple devices simultaneously. USB power strips are useful in homes, offices, and travel scenarios, providing efficient and accessible power distribution. 

Yes, power strips with USB C and other ports are generally safe to use when used according to the manufacturer's instructions and safety guidelines. Additionally, it's important to avoid low-quality models and choose reputable brands that often design their power strips with built-in safety features. For example, the Anker 615 USB Power Strip (GaNPrime 65W) uses ActiveShield™ 2.0 technology to offer surge protection, overload protection, etc.

The number of devices you can charge depends on the specific power strip model. Common configurations offer a mix of AC outlets and USB ports, ranging from 2 to 6 or more ports in total. For example, Anker's power cubes provide 6 outlets including 3 AC outlets, 2 USB-A ports, and 1 USB-C port, enabling you to charge devices like smartphones, tablets, laptops, and other gadgets at the same time. 

Yes, you can charge high-power devices like laptops with a USB power strip, but it also depends on the power strip's specifications. Some power strips with USB C ports support Power Delivery (PD), which can deliver higher wattage for fast-charging laptops and other power-hungry devices. For example, the Anker 615 USB Power Strip has a 65W USB-C port, allowing you to use a corresponding charging cable for iPhone 13 to charge it very efficiently.