What is portable power station(solar generator)?

What is a Portable Power Station? Or names in portable solar generator, battery power generator.
A portable and compact power source that can be used on multiple occasions to provide you with AC or DC power supply. The TATTU 100Wh portable power station is equipped with stable and safe performance LiFePO4 batteries. Reliable power for multiple recharge of mainstream electronics and small appliances making it perfect for both indoor use and off-grid outdoor activities use. What is more, the excellent large current discharge ability can jump-start a 12V car battery quickly in emergency circumstances.