Shipping LiPos

[JLiang]

So this is my first time sending a package international (USA), and included are a few LiPo batteries. Is there anything I should be worried about WRT shipping these batts?

From what I read, I should put them at storage charge and just tell the courier that they're in the package. Is that enough? And if not, is there any way to ensure they don't explode or get damaged on transit?

Thanks!