Lithium Ion batteries and flying. You might be given trouble at the airport when your checked or carry-on bags contain batteries, like the Venvolt or the Accelerator. @CaNerdIan had a great idea though – put one of those shipping/warning labels on your bag!
UN3481 is one of several categories for shipping/flying with Lithium Ion Batteries, but is probably the one you are most interested in. It defines a specification for batteries that are under 100 Watt-Hours of capacity and are contained within a finished product. If you’re shipping spare cells, not in a product’s enclosure, then you’ll need to research the classification that applies to the type and size of cells you have.
Here’s a label I made up and printed out. I taped one to the top of my Venvolt, and then hung another one from my backpack’s handle just in case. The TSA did look at it (they were mostly impressed with the size of the Venvolt) but they let it through screening without any further concern.
Credit goes to the United Nations Economic Commission for Europe, via Wikipedia, for the SVG of the logo, which is considered Public Domain and is free to reuse. Similarly, this PDF file I am providing is also free to use.
