Electric wristwatches are often environmentally friendly because they are powered by solar cells. However, there are also many watches on the market - especially classic quartz watches - which are still powered by a battery. Reliability and accuracy are generally highly valued in wristwatches with an electric movement. The maximum deviation per month is just ± 30 seconds. Only radio-controlled watches exceed this value. Another strength of electric watches is that they are usually robust and low-maintenance watches.