Each model is required to have a rated battery capacity of at least 300 watt-hours (Wh), which allows you to run a 300-watt appliance for one hour. Each model needs a max output rating of 200 W or more, letting you charge a high-power device or a few low-power devices at once. . 12 MONTHS SERVICE: Powkey portable power supply will offer 12 months Quality Reply and 7*24 customer service after your purchase. If you have any problem, please feel free to contact us via Amazon's message. What are the shipping options for Portable Power Stations? All Portable Power Stations can be shipped to you at. . Portable power stations can deliver power when you need it most, whether during power outages or just for an off-grid adventure. These handy electricity suppliers vary in size, output, and energy source, not to mention durability. That's why we've tested 22 models since 2022; some we've kept on. . The WEN Power Station generates up to 600 surge watts and 300 rated watts of power, making it a safe and reliable backup power source for sporting events, camping, long road trips, and more. No engine means no noise, no fumes, and no maintenance. Each model must weigh. . Keeping devices charged on the go is an everyday need now, whether I'm camping, traveling, or just out for the day. Portable power supplies give me backup power for phones, tablets, small electronics, and sometimes even small appliances.