How Many Volts Are 3 Aaa Batteries. This can go up or down however based on the amp level that the battery operates at. A reasonable minimum voltage is 16V for two cells.

Actually AA and AAA are also 15 volts. This can go up or down however based on the amp level that the battery operates at. A suitable voltage for an AA and Triple-A batteries is something in between 11V and 15V.
How much power does 3 AAA batteries produce.
This can go up or down however based on the amp level that the battery operates at. If the battery tests at less than 13 volts in the multimeter it no longer functions properly and should be replaced. No need for any circuitry just wire the LED right up to the battery. Each battery is 15 volts so if 3 AA batteries are connected in series then you get 45 volts the voltage is additive.

