All Goal Zero power products have a number in their name, ex. Venture 30, Flip 36, Goal Zero Yeti 500X. These numbers refer to the Watt Hours (Wh), or the 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 500Wh battery should run a 100W light for 5 hours (500/100=5). If your gear falls within the 500Wh capacity of the Yeti, you’ll want to check the restrictions on each of the output ports. When you’re deciding on what to power from your new Goal Zero power bank or power station, it’s helpful to look into your device’s wattage consumption.