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knuckles
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« on: March 08, 2013, 04:54:44 pm »
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anyone tried or even seen them despite their high costs ?
looks like the way to go ,they last 20 years without a re charge ¬
i dont know how common or what price is tritium to make the batteries .
sound s like a job for Doc Oc

$1200 for a unit..phew ,but 20 years usage sounds usefull ...
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majenko
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« Reply #1 on: March 08, 2013, 05:04:52 pm »
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NASA use them... They're on Curiosity right now, trundling around Mars.  You might ask them if you can take it for a spin...
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johnwasser
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« Reply #2 on: March 08, 2013, 05:17:56 pm »
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Quote from: knuckles on March 08, 2013, 04:54:44 pm
$1200 for a unit..phew ,but 20 years usage sounds usefull ...

Unfortunately they only put out 50 to 350 nanoAmps (0.05 to 0.35 microAmps).

http://www.citylabs.net/index.php?option=com_wrapper&view=wrapper&Itemid=20
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JoeN
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« Reply #3 on: March 08, 2013, 07:04:23 pm »
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I prefer mine bigger...
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majenko
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« Reply #4 on: March 08, 2013, 07:08:48 pm »
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Show off.

Is that you stood next to it?
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James C4S
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« Reply #5 on: March 08, 2013, 08:18:57 pm »
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So.  Many.  Inappropriate. Jokes.
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Henry_Best
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« Reply #6 on: March 08, 2013, 10:11:14 pm »
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Quote from: majenko on March 08, 2013, 07:08:48 pm
Show off.

Is that you stood next to it?

Yep. But you can't see him when he hasn't got his bandages on...
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JoeN
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« Reply #7 on: March 08, 2013, 10:16:41 pm »
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That is a NASA physicist or contractor and she is certainly female, no that is not me.  The link is a hot-link to Wikipedia's article on RTGs.

http://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator
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knuckles
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« Reply #8 on: March 09, 2013, 02:42:57 pm »
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http://micgadget.com/32782/you-can-easily-buy-an-nuclear-battery-in-china-that-could-last-for-a-thousand-years/
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« Reply #9 on: March 09, 2013, 02:50:38 pm »
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Quote from: knuckles on March 09, 2013, 02:42:57 pm
http://micgadget.com/32782/you-can-easily-buy-an-nuclear-battery-in-china-that-could-last-for-a-thousand-years/

Let me sell you a pack of "Prosperity Seeds" so you will be rich!
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JoeN
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« Reply #10 on: March 09, 2013, 03:22:16 pm »
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Quote from: knuckles on March 09, 2013, 02:42:57 pm
http://micgadget.com/32782/you-can-easily-buy-an-nuclear-battery-in-china-that-could-last-for-a-thousand-years/

The half life of tritium is 12.32 years.  It's not going to last 1000 years.  After 100 years only 0.36% will remain.  After 1000 years, 3.7E-25.  I'm sure the betavoltaics have a cutoff threshold at some point where there is no voltage despite some residual beta activity.
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