The Yeti Link Expansion Module allows you to chain a Yeti Tank Expansion Battery to a Yeti Lithium Portable Power Station to increase your energy storage capacity. When placed in “Car Mode,” Yeti Link can also be used to recharge a Yeti Lithium from your vehicle. NOTE: The Link is only compatible with a Yeti 1000, 1400, or 3000 Lithium. Please note the Yeti Link is not currently compatible with Yeti X Power Stations. Stay tuned for a compatible Yeti X Link solution coming this Fall. Usage Note: The Yeti Link Expansion Module and Yeti Lithium MPPT Solar Charging Optimization Module use the same expansion bay therefore they are unable to be used at the same time.