Goal Zero: The next generation of power is here! Introducing the all new Yeti PRO 4000 portable power station with dramatically more power and faster charging than previous generation models. Plus, its updated LiFePO4 battery tech means it can last for over 10 years&mdash;even with daily use.We&rsquo;re pushing harder the 3000X OB, 700 OB, as highlighted below, since they are the ones we have the most stock of and they are amazing deals.