Solar power devices for providing power to handheld devices

This invention describes a power panel designed to charge handheld devices like phones or PDAs using light from both the sun and indoor lamps. It works by arranging multiple solar cells on a base, connected together to generate electricity. The patent specifically mentions using oxidized chrome for the solar cells and a busbar for connecting them.

Why it matters: Since 2003, photovoltaic cell efficiency, especially for low-light conditions and in compact sizes, has significantly improved. This makes the concept of effectively charging handheld devices from varied light sources more practical and powerful today.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedSpecialized photovoltaic cell manufacturing

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