LED questions?

1. Would an LED last longer hooked up to a 3V battery if it is 1.5V or 3V? Would the 1.5V actually "die" due to the excessive voltage? 2. Would a 5V resistor work (well) with a 3V battery and 1.5V/3V LED? 3. Does the mcd of the LED affect the battery life? If so, does a higher mcd drain the battery... show more 1. Would an LED last longer hooked up to a 3V battery if it is 1.5V or 3V? Would the 1.5V actually "die" due to the excessive voltage?
2. Would a 5V resistor work (well) with a 3V battery and 1.5V/3V LED?
3. Does the mcd of the LED affect the battery life? If so, does a higher mcd drain the battery faster or slower?

Thanks.
Update: The forward voltage is 1.5V/3V
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