No difference. Light energy watches, also called solar watches, can move as long as the surface is exposed to light and can last for a while in places without light.
Ecology-Drive in English is a watch with an integrated system that converts light energy into electrical energy. Because it uses batteries that do not need to be thrown away, it can save limited earth resources and reduce pollution, making it a truly environmentally friendly product.
In 1996, it obtained the first “Environmental Product Mark” certification in the watch industry in Japan. In 2001, it obtained the first "Environmental Labeling Product" certification in the Chinese watch industry. Not only have "light-powered watches" been realized, but harmful metals such as mercury and cadmium are no longer used in rechargeable batteries.bles. In addition, the manufacturing of product materials avoids the use of fluorine and other harmful substances and has passed various strict certification standards.
Detailed information:
Technical content of light powered watches:
< p>1. The product's rechargeable batteries or capacitors must not contain heavy metals such as mercury, cadmium and their compounds.2. p>
3. Once the energy storage component is fully charged, the product should be able to operate normally within seven days if placed in a location where it cannot be charged (i.e. in the dark) .
4. The product must be equipped with an anti-overload device.
5. Under normal use, the life of the photodynamic energy battery system shall be guaranteed for at least seven years.
6. The product design shall be cable to guarantee that it can work normally even if ordinary batteries are installed.
Reference materials:
Baidu Encyclopedia -Photo Energy Watch -kinetics< p>Reference materials:
Baidu Encyclopedia-Light Energy Meter