Hand-crank powered flashlight

The essence of camping is to be self-sufficient, and maybe for ten days or half a month you might not find a single household. At this point, electricity for lighting becomes a major difficulty. Luis Ribeiro has designed a hand-cranked power generating flashlight. Simply put, it consists of three tubes that can rotate freely at 360 degrees. On both ends, there are five LED bulbs evenly distributed. There are two power generation units set at the connection points. You just need to hold both ends, gather your strength like in Wing Chun, and elegantly spin it quickly to charge it. It's said that one minute of work can provide 45 minutes of power, which is not only environmentally friendly but also enhances physical fitness.