Bestbuy offers Fremo - X300 276 Watt Battery Powered Portable Generator (276 Wh Capacity) - Grey for $170.99 (orig. $329.99) with free shipping.

Product Description:
FREMO X300 is the industry leading flagship portable power station delivering ultimate performance. Equipped with a capacity of 276Wh, the FREMO X300 portable power station can meet most of your charging needs for daily use and outdoor adventures. With 9 output ports and its lightweight design of only 8 lbs, you can keep all your gear powered wherever you go.

• Premium battery
  Equipped with EVE lithium-ion battery, the world's leading battery cell manufacturer for new energy electric vehicle, with reliable quality and a cycle life of 600+.
• Safe and reliable
  The FREMO X300 is safe and eco-friendly. The built-in Battery Management System (BMS) and pure sine wave inverter protect your sensitive devices from damage.
• Multiple charging ways
  Supports USB-C PD 100W charging and standard adapter charging.
• Portable and stylish
  The FREMO X300 portable power station has a user-friendly design, small size, and durable leather handle, making it lightweight with only 8lbs, stylish, and easy to carry.