Challenger Battery
| Challenger Battery | |
|---|---|
| A Canon de 155mm GPF of the Challenger Battery | |
| Location | Entrance Point, Garden Island, Western Australia | 
| Coordinates | 32°09′31″S 115°39′53″E / 32.1587°S 115.6647°E | 
| Official name | J Gun Battery | 
| Type | Listed place (Historic) | 
| Designated | 22 June 2004 | 
| Reference no. | 105272 | 
| Official name | Challenger Battery | 
| Type | City of Rockingham Heritage List | 
| Reference no. | 3301 | 
Challenger Battery, also referred to as J Gun Battery, is a heritage-listed battery at Entrance Point, Garden Island, Western Australia. Historically, it has is also been known as Garden Battery, Entrance Battery and, finally, Challenger Battery. It was added to the Australian Commonwealth Heritage List on 22 June 2004. It was part of the Coastal defences of Australia during World War II and the Fremantle Fortress, protecting Fremantle Harbour.