Best to contact the company for those questions. Contact Information Address Beacon Power, LLC 65 Middlesex Road Tyngsboro, MA 01879 USA Phone (978) 694-9121 (978) 649-7186 Fax (888) 938-9112 Toll Free http://www.beaconpower.com/contact/index.asp If you find out would you please post. Thxs.