The second piece of the kit is effectively an enormous battery with a few simple controls onboard. Three different battery sizes are available, each one offering more wattage and more power than the last. I received the top-level battery, denoted the X Pro 10, which weighs 26 pounds on its own and is rated for a whopping 60 amp-hours (Ah) of capacity. That provides a maximum running time of 10 hours—albeit on the device’s slowest setting. (Two lower-capacity models are available with 30 Ah and 15 Ah of capacity, respectively; note that these also have lower GPM throughput power in addition to shorter maximum running times.)