jis
Permanent Way Inspector
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Yes. I concur. I have carried laptop with a large battery attached and a second battery in tow. Similarly for my DSLR camera I always carry a second charged battery properly stored in the protective plastic casing which prevents an accidental short circuit. No problem at all. That is the reason that I had explicitly asked both United and Lufthansa for an opinion before doing any such.Your links refer to shipping rules for air cargo while Jis is discussing carry-on luggage, which has a different set of rules. I don't fly as much as Jis does but my personal experience is that carrying large lithium ion batteries with you into the passenger cabin is of no particular problem so long as you are also carrying portable equipment that would explain their purpose and use. This includes lithium batteries that are both physically large and energy dense.I've seen stuff like this:
http://www.kodak.com/eknec/documents/6e/0900688a8088d86e/us_dot_ban.pdf
On August 9, 2007, the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration (PHMSA) issued a final rule banning or restricting the transport of non-rechargeable lithium batteries and devices shipped with these batteries aboard passenger aircraft. These new rules become effective on January 1, 2008 and can be found in their entirety in the August 9, 2007 edition of the Federal Register, which is accessible via the internet through http://www.gpoaccess.gov/fr/index.html. These new rules supplant emergency interim rules issued in December 2004. This summary applies to non-rechargeable lithium batteries shipped from, into or within the United States.
NON-RECHARGEABLE LITHIUM BATTERIES
The transport of any amount of non-rechargeable lithium batteries is prohibited aboard passenger aircraft except for personal use as noted in the DOT Safe Travel website. In addition, the outer shipping container of all packages containing non-rechargeable lithium batteries must be marked as stated below.
I don't have the time to read all of this:
http://data.energizer.com/PDFs/lishipmentpolicy.PDF
They have labels for boxes.
https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcTg-j89yEjJFja87uPm2_C6g9oO3f37g4hMcQC8aZwTmdE374Il
OTOH, putting any in checked baggage is a no ... no these days. So much so that you cannot place Christmas gifts that contain batteries in checked baggage. And by extension if you have such an item in checked baggage even without a battery in it, your friendly TSA might open your bag for visual inspection, silly as it may sound. Also raises some interesting issues in gate check situations. Moral of the story - better to ship such things by Fedex or UPS rather than try to place it in a large bag that you want to try to carry on board.
I am not in the battery wholesale business so I don't keep track of what rules apply to large shipments.
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