IKEA Sunnan table lamp
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Removable solar panel of the IKEA Sunnan table lamp
includes 3 NiMH 1.2V 1200 mA AA batteries; charging takes 9-12 hours in direct sunlight.
can be used for powering boards such as Arduino (Pro, FIO, Seeeduino Stalker ...), STM32, MSP430 ... or wireless sensor nodes
a 3.3V regulator could be useful