OPEN BOX: Designed for charging phones, tablets, cameras, and more, the Goal Zero Yeti 400 Lithium can also be used as an alternative to a gasoline-powered inverter generator, running small appliances, lights, even medical devices during short power outages. Open Box items may look and feel brand new, although packaging may no longer be up to Goal Zero standards to sell as brand new. Products may be unused returns or demo models and no longer have packaging. Product are in good condition and verified to be functional. No Returns or Exchanges. 6 Month Warranty. Additional promos or discounts cannot be applied to the already reduced price.