OnePlus Open
The OnePlus Open packs a relatively large battery for a foldable. It comes with a 4,805mAh lithium-ion power cell that's split in two with one 3,295mAh cell and one 1,510mAh cell. Combined, they are just a few milliamp-hours less than the Pixel's 4,821mAh battery, but more than the Z Fold 5's 4,400mAh.