Battery approximately 80m SE of East Weare Camp

This is a large battery dating originally from the 1860s, altered during the 1880s and again during the 20th century. It is located on the northeastern side of the Isle of Portland. The battery has magazine stores constructed primarily of stone under earth mounds, with gun positions of concrete and stone. Access is from the north along a vehicle track that passes garrison buildings and a former, unlisted Battery B; south of these is a freestanding, L-shaped building and the magazine stores, housed within a large earth mound. This has an internal corridor running roughly north to south, with the stores accessed off it. The two gun positions lie to the east.

At the northwest corner of the magazine stores is a small, L-shaped building of coursed stone, featuring a ramped parapet wall and individual door and window openings corresponding to the rooms within. This section survives relatively intact from the original 1860s construction. To the south, the large magazine store is housed underneath an earth mound, with sections of stone elevations displaying arched openings providing access to the corridor within. The walls are of coursed ashlar stone with some later brick repairs. To the east are two gun positions from rebuilding around 1900, mostly of concrete, with some surviving ironwork and curving passages to the sides, some with sections of collapsed ceiling.

The northern L-shaped building contains four rooms, each with its own external access, some of which have later fireplaces. The main magazine building contains a series of six barrel-vaulted rooms, accessed from a long internal passage, which served as shell and cartridge stores, with a men's shelter at the southern end. The walls are mostly of stone with brick vaulted ceilings. Some rooms retain timber doors, some with painted signs. Each room has a small opening at the end, with a lighting passage beyond. Further subterranean stores are believed to exist to the east, but have not been inspected.