Outstanding!: December 2007 Archives


December 28, 2007

Schneier notes the TSA's new rules about lithium ion batteries. Here's their overall policy:
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!

This seems like it will be a lot of fun. I'm really looking forward to watching TSA reps try to figure out whether a given device has over 8-gram equivalents of lithium in it, let alone trying to add up the watt hours in various devices to decide if they are over 300 (note that 8 grams is claimed to be about 100 watt-hours, so what if you have 302 watt-hours, which is over 300, but probably less than 25 grams). This "contact the manufacturer" thing is pretty nuts. TSA needs to have a list to decide what they want to accept. Why don't they just publish it?

Another thing that's weird is that you can't have spare batteries in your checked luggage, but you are allowed to have such batteries installed in your devices. I'm sure my laptop will contain any fires or explosions. Outstanding!


December 7, 2007

You know, I never thought that I would never need to worry about hard drive neutrality. When I first heard about this I just sort of assumed it would be something vaguely sensible that people were overreacting to, but no, when you go to the site it sure seems to be true.
Due to unverifiable media license authentication, the following file types cannot be shared by different users using WD Anywhere Access.

If these file types are on a share on the WD My Book World Edition system and another user accesses the share, these file will not be displayed for sharing. Any other file types can be shared using WD Anywhere Access.

The list includes: MP3, AVI, WMA, AAC, etc. Outstanding!