This product is lots of fun, great for camping, on the boat. Makes a great gift. A great inexpensive way to start using solar energy. Rechargeable batteries are a pretty easy purchase decision. Using rechargeables, you pay pennies.
Disposable batteries are a major source of toxic mercury released into the air.
Rechargeable batteries, particularly Ni-Mh and rechargeable alkaline are very friendly to our environment. That means if you treated them well, these batteries, if charged and discharged twice a week, could last almost 10 years. Rechargeable Batteries and more. . The applications for these small solar panels are limited only by your imagination. Perfect for solar powering or charging projects with small DC loads.