Corded is still a good option - Milwaukee Random Orbit Palm Sander review - YouTube
Milwaukee M12FDSS-0B Delta/Spot Sander
Milwaukee M12 Fuel Orbital Detail Sander 2531-20
Milwaukee M12 12-Volt FUEL Lithium-Ion Cordless Orbital Detail Sander Tool-Only W/Assorted Sanding Sheets, Sander Pad & Sponge Pad 2531-20-48-80-5406-49-36-2531-48-80-5402 - The Home Depot
Milwaukee M12 FUEL FDSS-422X 12v Brushless Sub Compact Spot/Delta Sander Inc 1x 2.0Ah & 1x 4.0Ah Batts | Powertool World