US Postal Service Won't Fly iPads, iPhones, MacBooks out of Country

USPS believes that lithium batteries - which feature in devices including the iPad, iPhone, MacBooks, and other smartphones, laptops, and tablets - pose too great of a risk to be shipped overseas. An amendment to the company's documentation states: "lithium batteries are not permitted in international mail."
The USPS will still allow these products to be shipped within the US. UPS and FedEx will continue to ship such items overseas, however.

USPS will lift the restriction in January 2013, however. The document explains: "On 1 January 2013, customers will be able to mail specific quantities of lithium batteries internationally (including to and from an APO, FPO, or DPO location) when the batteries are properly installed in the personal electronic devices they are intended to operate."

Apple is reported to have opposed stricter regulations restricting lithium-battery shipments by air.
The reason for regulations regarding the transportation of lithium-batteries by air is that they can spontaneously combust. The UN rules, which will become effective on 1 January 2013, state that pilots must be notified when lithium batteries are on a flight, shipments should be labelled as hazardous materials, and employees should have training in handling such cargo.
There have been several plane crashes directly attributed to exploding lithium batteries in the last few years, according to reports.

