Quoted from Blog http://www.schneier.com/blog/archive...ium_bat_1.html
"New Lithium Battery Rules for U.S. Airplanes
Starting in 2008, there are new rules for bringing lithium batteries on airplanes:
The following quantity limits apply to both your spare and installed batteries. The limits are expressed in grams of "equivalent lithium content." 8 grams of equivalent lithium content is approximately 100 watt-hours. 25 grams is approximately 300 watt-hours:
* Under the new rules, you can bring batteries with up to 8-gram equivalent lithium content. All lithium ion batteries in cell phones are below 8 gram equivalent lithium content. Nearly all laptop computers also are below this quantity threshold.
* You can also bring up to two spare batteries with an aggregate equivalent lithium content of up to 25 grams, in addition to any batteries that fall below the 8-gram threshold. Examples of two types of lithium ion batteries with equivalent lithium content over 8 grams but below 25 are shown below.
* For a lithium metal battery, whether installed in a device or carried as a spare, the limit on lithium content is 2 grams of lithium metal per battery.
* Almost all consumer-type lithium metal batteries are below 2 grams of lithium metal. But if you are unsure, contact the manufacturer!
Near as I can tell, this affects pretty much no one except audio/visual professionals. And the TSA isn't saying whether this is a safety issue or a security issue. They aren't giving any reason. But those of you who paid close attention to the Second Movie-Plot Threat Contest know of the dangers:
"
More info on http://safetravel.dot.gov/whats_new_batteries.html
"New Lithium Battery Rules for U.S. Airplanes
Starting in 2008, there are new rules for bringing lithium batteries on airplanes:
The following quantity limits apply to both your spare and installed batteries. The limits are expressed in grams of "equivalent lithium content." 8 grams of equivalent lithium content is approximately 100 watt-hours. 25 grams is approximately 300 watt-hours:
* Under the new rules, you can bring batteries with up to 8-gram equivalent lithium content. All lithium ion batteries in cell phones are below 8 gram equivalent lithium content. Nearly all laptop computers also are below this quantity threshold.
* You can also bring up to two spare batteries with an aggregate equivalent lithium content of up to 25 grams, in addition to any batteries that fall below the 8-gram threshold. Examples of two types of lithium ion batteries with equivalent lithium content over 8 grams but below 25 are shown below.
* For a lithium metal battery, whether installed in a device or carried as a spare, the limit on lithium content is 2 grams of lithium metal per battery.
* Almost all consumer-type lithium metal batteries are below 2 grams of lithium metal. But if you are unsure, contact the manufacturer!
Near as I can tell, this affects pretty much no one except audio/visual professionals. And the TSA isn't saying whether this is a safety issue or a security issue. They aren't giving any reason. But those of you who paid close attention to the Second Movie-Plot Threat Contest know of the dangers:
"
More info on http://safetravel.dot.gov/whats_new_batteries.html
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