Harbor Freight helmet stopped working

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Page 5 in the specifications and page 7:

"The ultra high performance of UV and IR Auto-Darkening filters provides to the user?s eyes and face full protection against UV and IR radiation during the entire welding process, even in the clear state. The UV/IR protection level is up to shade 16 at all times."

Also

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On page 50 you will find the same thing listed under Bandpass filter, "Jackson EQCs bandpass protects to a shade 14, even in the 'off' state".

Reply to
Pete C.
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Pete

Reply to
Pete Snell

Are they branded GP, Panasonic or something known? Or something like "Sunbeam"?

LR44/A76 are Alkaline cells. $5.54 for 10 at Digikey rated 150 mAh (to 0.9 volts) with a 7.5K load (Energizer brand) (at 1.2V terminal voltage you'll get only about 75% of that.

SR44/357 are Silver Oxide. $13.87 for 10 at Digikey. rated 195 mAh (to 1.2 volts) with a 6.5k load (Energizer brand)

If the electronics quits at 1.2V you'd expect around 57% of the life out of the Alkalines for 40% of the cost.

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But there are probably some pretty lousy generic cells out there where they cut corners on the energy content etc.

Best regards, Spehro Pefhany

Reply to
Spehro Pefhany

"Bill McKee" wrote in news:ZqadnfGNPoJyIFHWnZ2dnUVZ snipped-for-privacy@earthlink.com:

Thank you, glad you brought that up. ;)

Reply to
Sano

I always pick up four batteries when they are on sale. I would buy more, but I don't like them sitting around that long before use. Then I use a little digital meter to test the old one and the new one. And older weak one will still function down to a certain level, but I like to keep one in there that's "hot".

Steve

Visit my blog at

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Reply to
Steve B

Note that you can significantly extend the shelf life of a cell or battery by refrigerating it. You probably don't want to truly freeze it, as that could burst the cell, but put them in a ziploc baggie and keep them in the unfrozen food section of the 'fridge.

Enjoy, DoN.

Reply to
DoN. Nichols

Better living through chemistry!!!

[ but I don't like them sitting around that long before use.

just a note: one place I've found very inexpensive (maybe $3 for a pack of 4 or 6) button cells of all sizes is at Princess Auto which I suppose is the Canadian equivalent to HF....certainly carries much of the same re-branded stuff, so you might look there if you are in need. FYI

cheers,

-m in Ottawa

Reply to
mkzero

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