Ask Smithy Xtra Commodore cutting out

My 2002 Holden Commodore Series II cuts out occasionally. It first happened when I was pulling out of my driveway, and it sounded like the car was choking before it just cut out. I tried to restart it numerous times, but it just kept cutting out. The battery warning light came up so I thought it was the battery, but it was fine when the RACV guy turned up 15 minutes later. It has happened twice more since. What could be wrong?