"check engine" light and "battery" light are on at the same time

Oh by the way…I had a 1999 Chevy Malibu…When my serpentine belt broke every single warning light except the oil pressure light came on. And the car still started but I didn’t drive it because without a serpentine belt, the power steering won’t work and the car will overheat because there’s no belt turning engine’s cooling fans.