Project Numa: Low Cost Disposable Battery for the Developing World (UC Berkeley)

Current lighting and phone charging solutions in off-grid regions are hazardous, expensive, and inconvenient. The Low Cost Disposable Battery project addresses these major drawbacks using cheap and safe materials, representing a major shift in the way traditional batteries are made. Users will purchase and assemble the batteries themselves, replacing components as necessary. This solution puts the power in the hands of families, allowing them to personally control their power usage in the safety of their home, at all times of the day, and at a low cost.