Great for making powerful Beam Robots, this lightweight glass cell puts out 3.5VDC open circuit voltage and 15ma short circuit current in sunlight. Size is only 25mm x 53mm. Weighs about 5 grams (0.176 oz). Has blocking diode attached to prevent discharge of your battery or capacitor when light is not striking cell (can be bypassed if desired). Has 2 insulated wire leads for hookup so you don't have to hassle with soldering to the glass! G4400