The answer is generally yes—but there are important conditions. While most airlines allow personal power banks in carry-on luggage, each carrier may have slightly different restrictions regarding battery capacity, measured in watt-hours (Wh), not mAh.
This silicon is derived from high-purity quartz sand, and even trace amounts of impurities, especially iron, can significantly impact solar panel performance. Too much iron in sand leads to lower energy output, higher production costs, and shorter panel lifespans.