I have an Led with the following specifications: 3-3.2 V Size (mm) : 5mm Lens Color : Water Clear Reverse Current (uA) : <=30 Life Rating : 100,000 Hours Viewing Angle : 140 Degrees Absolute Maximum Ratings (Ta=25°C) Max Power Dissipation : 80mw Max Continuous Forward Current : 24mA Max Peak Forward Current : 75mA Reverse Voltage : 5~6V IF i use two or 3 LR41 batteries connected to it, how long will the power last? Do I really need to use a resistor for this setup? If I use two or 3 LR44 batteries, how long will the power last? If I use one CR2032 battery, how long will the power? How can I solve these problems?