These assemblies for sun-powered garden lights consist of two glass photovoltaic cells mounted on a plastic bracket with a charging circuit, two rechargeable AA cells, and one amber LED. Between the solar cells is a photoresistor to sense light and dark conditions. In daylight the solar cells charge the battery. When it gets dark, the LEDs light. These are working units but the batteries are old and may not take a charge. Solar cell surface area is 3.78" x 1.98". Cells provide 2.6 Vdc @ 25mA in bright sunlight. MF370