The special thing about this watch is the power supply: A normal automatic rotor feeds the design energy generated in a electricity generator. The voltage generated is saved in a capacitor and then drives the quartz train. The clock needs sufficient motion energy (vibrations) per day to ensure continuous operation They are legally obliged to return used batteries as an end user. You can return old batteries that we have as new batteries in our range, free of charge at our shipping camp (shipping address). The symbols shown on the batteries have the following meaning: The symbol of the crowded garbage can means that the battery must not be added to household waste. PB = battery contains more than 0.004 mass percent lead CD = battery contains more than 0.002 mass percent cadmium HG =.