Did you know that watch batteries contain a very small amount of mercury - on average, less than 3 mg. - is used in silver oxide and manganese alkaline button-cell batteries to prevent a gassing process that would otherwise corrode the battery and the watch or clock that contains it.

Button-cell batteries should be recycled properly by having a professional watch technician remove the spent battery from the watch or clock and forward it to an appropriate waste management service for recycling. Watchbatteries.com sells watch battery and will properly dispose of old watch batteries for you.

Other websites that can help you with watch batteries are spare watch parts .com and retail batteries com 

 Both battery websites sell watch batteries and can recycle your old watch battery for you.