The Sultan Battery watch tower, constructed in 1784 by Tipu Sultan is in Boloor, 4 km from the centre of Mangalore city.
The watch tower was constructed in the era of the emperor Tipu Sultan such that now the area surrounding the decaying structure is its namesake. The watch tower was constructed 15 years before his death in 1784 A.D. The place was previously known as Sultan`s Battery (see artillery battery). It was constructed from stones of 23 churches destroyed by Tipu Sultan, during his 15-year imprisonment of the Mangalorean Catholics and the other Christians.

Sultan Battery was built of black stones and constructed to obstruct war ships from entering the river which was the major route for English invasion but was then retrieved from English by Tipu Sultan. Though the place holds the watch tower, it looks like a fort with mounting places for cannons. There is an underground storage area under the tower that was used to store gunpowder. It was the major dockyard and arsenal of the ruler. It was a naval station and was of great importance to the sultan as he used it to intercept enemy warships and prevent them from docking.
If one climbs to the top of the watch tower by stairs, there is a panoramic view of Arabian Sea shows a blend of natural and man-made beauty. It is now nearly deserted with a few shacks and a boating club nearby, but it is gathering popularity among tourists.