If you were getting a pack or cells sent to you by mail,
The United States Postal Service has banned all international shipments of electronics with lithium batteries effective May 16.
http://www.fastcompany.com/1836973/post ... one-laptop
Until such time that a less restrictive policy can be implemented consistent with international standards, and in accordance with UPU Convention, lithium batteries are not permitted in international mail.
http://about.usps.com/postal-bulletin/2 ... dt_004.htm