To help OEMs of portable medical and consumer electronic devices remain compliant with new laws banning the use of mercury in button cell batteries, a comprehensive line of 0% mercury silver oxide batteries is now available from Basel, Switzerland-based Rentata SA. These batteries are used to power a wide range of devices that include insulin pumps, glucose meters, surgical tools, and heart rate monitors. In March  2006, the National Electrical Manufacturers Association announced its commitment to eliminating added mercury from button cell batteries by June 30, 2011. On July 1, 2011, laws enacted by the states of Connecticut, Rhode Island, and Maine will become effective, making it illegal to sell devices powered by battery button cells that contain mercury, including all 1.4V zinc-air and 1.5V alkaline batteries, as well as 1.55V silver-oxide batteries. About 30 other states have also enacted, or are proposing, regulations addressing the use of mercury in batteries, meaning that OEMs must use 0% mercury button cells in their products if they are to be sold in the regulated states.