Air restriction about batteries
International aeronautics are coordinated and kind-of regulated by the IATA.

So, they are the prime source for questions regarding air shipping:

http://www.iata.org/whatwedo/cargo/dgr/Pages/lithium-batteries.aspx

But: That's definitely not the only restriction. In the end, every country has its own laws regarding the entry of goods. How are you planning to ship "without restrictions" to North Korea? The same goes for export regulations. If you're in the US, for example, exporting electronics to Iran might be impossible.

So, "without restriction" is not going to happen. Distribution of goods worldwide is a complicated business, because you might need to know the rules of every single country you ship to, and that's why most manufacturers of electronics don't directly sell to customers, but share their profit with distributors and importers.