Solar Watches are built using high-quality batteries to increase their life In general a solar watch will work continuously for around 10 years. For some of the best Solar Watches in the market, the lifetime can be around 20 years or so.
Fitbit smartwatch screen going back or turning off too quickly is one of the most common complaints you will find on the web. But, you need not worry about it as it is not a serious issue or even a problem at all. Most of the time, the reason is some change in the settings that has caused this problem.