If you mean the battery light comes on while the engine is running and then you stall, I would say that the battery could be old or the alternator is discharging your battery causing the stall. You could check out the latter using a volt meter. It should be charging at 13.5-14 volts.
If you meant the battery light comes on after the stall, then that would be normal. In this case, I would tune the car up to include replacing the distributor cap, rotor, and spark plugs.