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Old May 1st 17, 08:11 PM posted to rec.bicycles.tech
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Default torque wrench issues

On Monday, May 1, 2017 at 11:34:12 AM UTC-7, Ian Field wrote:

The people who made the RoHS list don't seem very keen on cadmium - like
most battery systems; the cadmium ones got an exemption. However - most
battery manufacturers seem to have voluntarily dropped cadmium. You can
still get them for specialist applications like security systems, but
general types have pretty much vanished from the shops.

I'm not aware of any restrictions on zinc - zinc/air hearing aid batteries
have if anything, increased in popularity. Because they need air to work -
they're not fully sealed.


I think that you would find that no one "voluntarily" ceased production because of health concerns but because Lithium Ion batteries are taking over the market.

Cadmium is not a very strong health hazard as a plating material. Zinc is poisonous if a large enough dose is given.

Cadmium ends up remaining in your liver and kidneys while I believe that Zinc can pass safely outside of it.

Remember that nitrogen is harmful if you don't get enough oxygen with it. So you have to draw a line between harmful and poisonous.

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