15971Re: new international rule about batteries
- Jan 1, 2008I would have thought it would be easier and cheaper to force the
manufacturers to make safe batteries than have to check millions of
passengers each year.
--- In PanoToolsNG@yahoogroups.com, Keith Martin <keith@...> wrote:
> Sometime around 1/1/08 (at 19:26 +0000) Jean-Marc Paratte said:
> >Read "GUIDE TO RULES EFFECTIVE JANUARY 1, 2008"
> >at end of this page:
> Well, Scooby Doo! For a site that's got so much specific detail
> that's spectacularly unhelpful. :-)
> But with a quick look at
> and some basic calculations, it seems that the Li-ion battery in my
> old D70 (7.5V 1400mAh) delivers approximately 10.5 'watt-hours'.
> (The maths: Although an electrician would point out that this isn't
> *entirely* accurate, it is possible to determine watts if you know
> amps and volts. Or in our case, watt-hours from milliamp-hours and
> volts. The calculation is amp * volts = watts, or (mAh * 1000) *
> volts = watt-hours.)
> According to the Safe Travel site, 8g of 'equivalent lithium
> delivers approximately 100 watt-hours. So it seems that my 1400mAh
> D70 battery has a fraction more than 0.8g of 'equivalent lithium
> The site then says very specifically:
> "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."
> The line "in addition to any batteries that fall below the 8-gram
> threshold" would seem to cover us for an open-ended quantity of
> batteries of any kind I've ever seen.
> Even if I've made a big error in the above calculations (it seems
> pretty dang clear but all things are possible) our batteries are
> significantly less beefy than the kind of laptop extender powerpack
> or prosumer camcorder batteries the site shows.
> I think we're safe. And if someone's still worried, take the
> with you, perhaps laid out to look nice 'n' official, and use that
> justify your dozens of spare Li-ion batteries. And remember to be
> clear that they aren't Lithium Metal batteries. :-)
> Department of Transport?
> Department of Fear, Uncertainty and Doubt, more like...
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