Stony Batter is a historic defence installation at the north-eastern end of Waiheke Island, Auckland, New Zealand.

[3] Stony Batter is located in the remote north-east of Waiheke Island, in a hilly area strewn with volcanic basalt.

While approved in 1939, construction was delayed for cost reasons until German raiders were sighted in New Zealand waters during 1940–1941, as well as the war entry of Japan in late 1941, suddenly turned it into a high-priority project.

In 1942, the site on Waiheke was chosen, but it took until early 1943 before the Public Works Department was finally tasked with construction after other contractors declined the job.

[5] Delays were caused by the remote location, which at first had no road access, and also by the fact that the project was kept in strict secrecy, requiring with a large degree of self-sufficiency during the construction period, complete with its own living facilities and machine shops.

[1][6] The tunnels and underground chambers were quarried by hand, with formwork for the walls and ceilings, then filled with concrete (reinforcing steel was not used due to shortages).

The thefts were of such a magnitude, said to be tens of thousands of dollar value per annum, that the viability of the stock fattening part of the landowner's business was being jeopardised.

The preservation society is currently trying to source an appropriate artillery piece to restore at least one gunpit to a similar state as it would have appeared in late World War II.