FollowA battery charger always comes in handy for charging up your exhausted AA or AAA cells (of course the rechargeable ones). Most of the battery chargers available in the market are either AC or DC powered. Though solar powered models are also available, they are quite costly. The DIY model described here is not going to cost you more than $5. It consists of a simple solar panel which converts the solar power into DC output and supplies the same to the battery holder, thus charging up the rechargeable batteries. The benefit of this model is that you can charge up your cells being off the grid, following an eco friendly concept.
