The Battle of Randeniwela was fought on 25 August 1630 in the Sinhalese–Portuguese War. It was fought between Portuguese Empire and King Senarth's youngest son Prince Maha Astana, who would later become Rajasinghe II against Portuguese forces commanded by then Governor Constantinu De Sá de Noronha. It was fought at Randeniwela near Wellawaya, a place close to the town of Badulla. The battle broke off when Constantino de Sá launched the invasion via Badulla. The Portuguese army suffered a complete rout subsequent to a mass defection by its Lascarin contingent.