It is relatively reliable and not dangerous. Solar power banks came into existence in 2012 and some people were developing products at that time. The goal is to convert solar energy into electrical energy. After testing, our current technology has not reached this level. A 5000 mAh product requires 16 days of exposure to sunlight to charge.
But I don't recommend buying it. For pure solar power, if there is another option you can choose an adapter to charge mobile power, maybe you can consider it. But if an adapter can support charging, why would you buy one with solar power that looks useful but isn't actually used? And for this you have to pay money.
Generally speaking, you can just buy a regular mobile power supply. Use an adapter to convert electrical energy into chemical energy in the batterye and use mobile power to charge your cell phone when needed.
The solar power bank converts solar energy into electrical energy to charge the power bank's battery, and the battery then charges your cell phone. In other words, when you plug in your cell phone, it shows that it is activated. is charging, it's not the solar energy that charges you, but it's the battery inside that charges you. Small solar panels usually don't cause big problems, that's what you see. The battery part is relatively uneven, some have low charging and discharging efficiency, others have short life due to the short charging and discharging time, and there are also safety risks such as high temperatures.
The price of ordinary solar power banks is between one hundred and two cents. There is only oneul solar panel and the solar charging power is low. Pure solar charging can take a week, which it does. not enough. In order to meet electricity demand, users still need to connect to the mains to recharge. Such a solar power bank is no different from an ordinary power bank.
The price of solar power quadruples. The bank costs between 300 and 400 yuan. After expansion, there are 4 solar panels, which greatly improves solar charging efficiency. According to the test, it can be fully charged in about 6 hours using pure solar energy. . It won the gold medal in the 2015 Chinese Characteristic Tourism Product Selection. If you choose solar energy, you should choose this one.