9 PHOTOVOLTAIC CELLS AND PANELS OF PHOTOVOLTAIC CELLS FOR THE PRODUCTION OF ELECTRICITY, BATTERY RECHARGERS, PHOTOSENSORS, CALIBRATED PHOTOVOLTAIC REFERENCE CELLS, AMPERE-HOUR METERS, ELECTRICAL CHARGE CONTROLLERS, BATTERIES, VOLTAGE REGULATORS AND MONITORS, AND HOBBY COLLECTIONS OF PHOTOVOLTAIC CELLS AND ELECTRICAL CIRCUIT COMPONENTS, COMPRISING DIODES AND RESISTORS, TO ENABLE THE ASSEMBLY OF OPERABLE ELECTRICAL CIRCUITS POWERED BY PHOTOVOLTAIC CELLS, TIN OXIDE COATED GLASS ELECTRICAL CONDUCTORS AND ELECTRONIC DISPLAYS