Solar Cells 1.Rechargable battery 2.QFsolar cells for indoor use 3.CE,ROHS,ISO Solar Cells QF-2510Features:Brief description: Indoor A-Si ... calculators,themometer,timer,battery, charger,flashlight,ectDetailed description: Spectrum responding curve of indoor A-Si solar cells is very similar ... , we can design and determine the area of the battery unit and the unit number of series connection. Technical ...