Portable energy storage power, hereinafter referred to as "outdoor power", is an alternative to the traditional small fuel generator, small built-in lithium ion battery energy storage equipment, has the characteristics of large capacity, high power, safe and portable, can provide the output voltage stability of AC/DC power supply system, battery capacity in 100 wh, wh - 3000 equipped with AC, DC, the Type - C, USB, PD and other interface, can match the market mainstream electronic equipment, suitable for outdoor travel, emergency disaster relief, medical rescue, working outdoors, and many other scenarios. In 2016, the global portable storage equipment shipment only 52000 units, 2021 shipments of 4.838 million units, compound annual growth rate of 148%. From the point of the size of the market, in 2016 the global portable energy storage market scale is only 060 million yuan, is expected to market scale has reached 11.13 billion yuan in 2021. Looking forward to the future, is expected in 2026 the global portable energy storage shipments and the size of the market will be 31.1 million units and 88.23 billion yuan respectively.