1KWh portable energy storage is widely used as backup power for household medical devices like ventilators and oxygen concentrators. With 1000W rated load and 1500W peak load, it can keep household ventilators working stably for 3 to 4 nights. Disaster-prone regions regard it as essential household medical disaster prevention equipment, so its popularity rises year by year in earthquake-prone Japan and Southeast Asia. Driven by disaster prevention demand, emergency backup scenarios account for 45.1% of the whole portable energy storage market in 2025. Compact 1KWh units can be placed in bedrooms and realize seamless power switch within milliseconds via UPS mode. Compared with fuel generators, it produces no exhaust gas and is more suitable for indoor medical use. As home medical care gains popularity worldwide, the annual growth rate of medical-oriented 1KWh energy storage stays above 23%.