"C-size batteries have dimensions of h=50mm, and a d=26.2 Nihm for C-size have about 2500mAH at 1.2V thin film solar cells have an efficiency of ~20% "
its worse. real C size = 5000-6000 mAh
so its really even more impractical. the cheapie c/d rechargables are no more than cases with AA inside.
heat does damage batteries. 15 minute chargers use fans to keep batteries cool. direct sunlight on a bright day would bake the cells. there might be reverse current flow as well:P
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"C-size batteries have dimensions of h=50mm, and a d=26.2
Nihm for C-size have about 2500mAH at 1.2V
thin film solar cells have an efficiency of ~20% "
its worse. real C size = 5000-6000 mAh
so its really even more impractical. the cheapie c/d rechargables are no more than cases with AA inside.
heat does damage batteries. 15 minute chargers use fans to keep batteries cool. direct sunlight on a bright day would bake the cells. there might be reverse current flow as well:P