Summer heat often strains power grids, leading to brownouts and blackouts. This is a particular problem for refrigerators, which come loaded with food and perishables that can go bad in a matter of hours. Bluetti’s FridgePower is an ultraslim portable power station that’s designed to connect exclusively to your fridge to keep it running during outages. “While portable power stations can run a fridge, they often require manual intervention during a crisis,” said James Ray, spokesperson for Bluetti, in a press release about an earlier Kickstarter campaign. “We engineered FridgePower to eliminate that friction — providing a specialized, automatic backup that…