It's only $3 including shipping and includes a rechargeable lithium ion battery (that will hold its charge much longer than nicd or nimh types):
The inside:
It's pretty basic, no charge control or low battery shutoff circuit. (Avoid discharging the battery completely for longest life.) There is just a blocking diode (not sure if it's just an ordinary one or a high efficiency schottky type) for the solar panel, the small lithium ion battery, 3 LEDs, and an on/off switch.
The inside:
It's pretty basic, no charge control or low battery shutoff circuit. (Avoid discharging the battery completely for longest life.) There is just a blocking diode (not sure if it's just an ordinary one or a high efficiency schottky type) for the solar panel, the small lithium ion battery, 3 LEDs, and an on/off switch.

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