May be charged. Casio's small square watches do not use lenses for solar charging. The Casio small square watch uses solar charging technology and has a specially designed solar cell. These watches usually have a small solar panel on the dial that absorbs energy from the sun or other light sources to charge it and stores the energy for use by the watch.
10 years. According to the query published on Casio's official website, the battery life of Casio solar watches is ten years. Photokinetic watches actually convert light energy into electrical energy through sunlight and then store it in the battery, meaning the battery is rechargeable. She will get old. After aging, the storage capacity will become very low and it will basically be scrapped. At that point, the battery will need to be replaced.