All Goal Zero power products have a number in their name, e.g. Venture 30, Flip 36, Goal Zero Yeti 500X. These numbers refer to the watt-hours (Wh) or amount of energy that can be stored in each battery and can help estimate how long your gear will run from each power bank or power station. For example, a 500 Wh battery should power a 100 Wh light for 5 hours (500/100=5). If your equipment falls within Yeti's 500-Wh capacity, you should check the limitations on each of the output ports. When deciding what to power with your new Goal Zero Powerbank or Powerstation, it is helpful to look at the wattage consumption of your device.