Make your own solar battery charger using 4 dollar store path lights to charge AA and AAA batteries. This will save you about $16 based on the average cost of a $20 solar battery charger.
This DIY solar battery charger only costs $4 for the four solar garden lights.
All you need for this project are four dollar store lights, a piece of scrap wood and a diode which you can salvage from some old electronics.
Watch the full video here:
And here is the article with the full details here:
http://www.thedoityourselfworld.com/articles/article.php?id=11504