SolarPocketLight
Version 1.0 (c) 2015 by Malte Marwedel
www.marwedels.de/malte

Source Code: GPL version 2 or later
Schematic: Creative Common, name required, non commercial (CC BY-NC 3.0 DE)

Warnings:
LEDs are bright. Do not look directly into them (when turned on).
UV light might not be seen, but may be harmful.
Do not use a solar cell which can generate more than 5.5V -> damage of electronics
Do not use a solar cell which can generate a current, which is above the allowed continue charge rate of the battery.

Errors:
The polyfuse F1 has a too high resistance, resulting in a too low current for the step-up converter. Replace by a common fuse.
Low rated fuses like 500mA have the same problem -> requires a fuse with a higher rate than necessary for the expected current.
Use 2.5A fuse in an external fuse holder (or modify the pcb).